diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0b168d..53057e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ v1.7
 - Fix FLEXIAPI-250 Allow Spaces to be declared without a subdomain
 - Fix FLEXIAPI-252 Update the hCaptcha Laravel library, use file instead of cookies to store the session to prevent empty errors bags
 - Fix FLEXIAPI-254 Allow no data on POST requests to not trigger the ValidateJSON middleware
+- Fix FLEXIAPI-255 Create a INSTALL.md tutorial and log FlexisipPusherConnector errors
 
 v1.6
 ----
diff --git a/INSTALL.md b/INSTALL.md
new file mode 100644
index 0000000..49c52da
--- /dev/null
+++ b/INSTALL.md
@@ -0,0 +1,165 @@
+# DotEnv configuration
+
+FlexiAPI relies on [DotEnv](https://github.com/vlucas/phpdotenv) to be configured. This configuration can be accessed using the existing `.env` file that can be itself overwritten by an environnement variables.
+
+Thoses variables can then be set using Docker-Compose, a bash script or a web-server.
+
+If you're installing FlexiAPI from the RPM package you can find the configuration file at `/etc/flexisip-account-manager/flexiapi.env`.
+
+# 1.a Manual setup
+
+Clone the repository, install the dependencies and generate a key.
+
+    composer install --no-dev
+    php artisan key:generate
+
+Then configure the database connection in the `.env` file (from the `.env.example` one). And migrate the tables. The first migration *MUST* be run on an empty database.
+
+    php artisan migrate
+
+You can also run the test suit using `phpunit`.
+
+To know more about the web server configuration part, you can directly [visit the official Laravel installation documentation](https://laravel.com/docs/).
+
+# 1.b Packages setup
+
+FlexiAPI is packaged for Debian and RedHat, you can setup those repositories using the Flexisip documentation https://wiki.linphone.org/xwiki/wiki/public/view/Flexisip/1.%20Installation/#HInstallationfromourrepositories
+
+    yum install bc-flexisip-account-manager # For RedHat distributions
+    apt install bc-flexisip-account-manager # For Debian distributions
+
+# 2. Web server configuration
+
+The package will deploy a `flexisip-account-manager.conf` file in the apache2 configuration directory.
+This file can be loaded and configured in your specific VirtualHost configuration.
+
+# 3. .env file configuration
+
+Complete all the other variables in the `.env` file or by overwritting them in your Docker or web-server configuration.
+
+## 3.1. Mandatory `APP_ROOT_HOST` variable
+
+`APP_ROOT_HOST` contains the HTTP host where your FlexiAPI is hosted (eg. `flexiapi.domain.tld` or directly `flexiapi-domain.tld`).
+
+This is the host that you'll define in the Apache or webserver VirtualHost:
+
+    ServerName flexiapi-domain.tld
+    ServerAlias *.flexiapi-domain.tld
+
+If you are planning to manage several SIP domains (see Spaces bellow) a wildcard `ServerAlias` as above is required.
+
+## 3.2. For manual setups
+
+`APP_KEY` Can be set using the `php artisan key:generate` command.
+
+# 4. Spaces
+
+Since the 1.6 FlexiAPI can manage different SIP Domains on separate HTTP subdomains.
+
+A Space is defined as a specific HTTP subdomain of `APP_ROOT_HOST` and is linked to a specific SIP Domain. It is also possible to host one specific Space directly under `APP_ROOT_HOST`.
+
+By default administrator accounts in Spaces will only see the accounts of their own Space (that have the same SIP Domain).
+However it is possible to define a Space as a "SuperSpace" allowing the admins to see all the other Spaces and accounts and create/edit/delete the other Spaces.
+
+## 4.1. Setup the first Space
+
+You will need to create the first Space manually, generally as a SuperSpace, after that the other Spaces can directly be created in your browser through the web panel.
+
+    php artisan spaces:create-update {sip_domain} {host} {--super}
+
+For example:
+
+    php artisan spaces:create-update company-sip-domain.tld flexiapi-domain.tld --super
+    php artisan spaces:create-update other-sip-domain.tld other.flexiapi-domain.tld
+
+## 5. Create a first administrator and finish the setup
+
+Create a first administator account:
+
+    php artisan accounts:create-admin-account {-u|username=} {-p|password=} {-d|domain=}
+
+For example:
+
+    php artisan accounts:create-admin-account admin strong_password my-company-sip-domain.tld
+
+You can now try to authenticate on the web panel and continue the setup using your admin account.
+
+# Other custom configurations
+
+## Multiple virtualhosts option
+
+In your web server configuration create several VirtualHosts that are pointing to the same FlexiAPI instance.
+Using the environnement variables you can then configure FlexiAPI per instance.
+
+With Apache, use the [mod_env](https://httpd.apache.org/docs/2.4/mod/mod_env.html) module.
+
+    SetEnv APP_NAME "VirtualHost One"
+
+On nginx use `fastcgi_param` to pass the parameter directly to PHP.
+
+    location ~ [^/]\.php(/|$) {
+        …
+        include /etc/nginx/fastcgi_params;
+        fastcgi_param  APP_NAME     "VirtualHost Two";
+    }
+
+> **Warning** Do not create a cache of your configuration (using `artisan config:cache`) if you have a multi-environnement setup.
+> The cache is always having the priority on the variables set in the configuration files.
+
+## Multiple .env option
+
+To do so, configure several web servers virtualhosts and set a specific `APP_ENV` environnement variable in each of them.
+
+Note that if `APP_ENV` is not set FlexiAPI will directly use the default `.env` file.
+
+FlexiAPI will then try to load a custom configuration file with the following name `.env.$APP_ENV`. So for the previous example `.env.foobar`.
+
+You can then configure your instances with specific values.
+
+    INSTANCE_COPYRIGHT="FooBar - Since 1997"
+    INSTANCE_INTRO_REGISTRATION="Welcome on the FooBar Server"
+    INSTANCE_CUSTOM_THEME=true
+    …
+
+## Custom theme
+
+If you set `INSTANCE_CUSTOM_THEME` to true, FlexiAPI will try to load a CSS file located in `public/css/$APP_ENV.style.css`. If the file doesn't exists it will fallback to `public/css/style.css`.
+
+You can find an example CSS file at `public/css/custom.style.css`.
+
+## Flexisip Push notifications pusher
+
+The API endpoint `POST /account_creation_tokens/send-by-push` uses the `flexisip_pusher` binary delivered by the [Flexisip](https://gitlab.linphone.org/BC/public/flexisip) project (and related package). You must configure the `APP_FLEXISIP_PUSHER_PATH` and `APP_FLEXISIP_PUSHER_FIREBASE_KEYSMAP` environnement variables to point to the correct binary.
+
+    APP_FLEXISIP_PUSHER_PATH=/opt/belledonne-communications/bin/flexisip_pusher
+
+This binary will be executed under "web user" privileges. Ensure that all the related files required by `flexisip_pusher` can be accessed using this user account.
+
+    /var/opt/belledonne-communications/log/flexisip/flexisip-pusher.log // Write permissions
+    /etc/flexisip/apn/*pem // Read permissions
+
+## SELinux restrictions
+
+If you are running on a CentOS/RedHat machine, please ensure that SELinux is correctly configured.
+
+Allow the webserver user to write in the `storage/` directory:
+
+    chcon -R -t httpd_sys_rw_content_t storage/
+
+Don't forget to make this change persistent if the directory may be relabeled :
+
+    semanage fcontext -a -t httpd_sys_rw_content_t storage/
+
+You can use the restorecon command to verify that this is working :
+
+    restorecon storage/
+
+If your database is located on a remote machine, you should also allow your webserver user to connect to remote hosts:
+
+    semanage port -a -t http_port_t -p tcp 3306 // Open remote connections on the MySQL port for example
+    setsebool -P httpd_can_network_connect 1 // Allow remote network connected
+    setsebool -P httpd_can_network_connect_db 1 // Allow remote database connection
+
+If you are planning to send emails using your account manager:
+
+    setsebool -P httpd_can_sendmail 1 // Allow email to be sent
diff --git a/Makefile b/Makefile
index 6a03cd0..2307b63 100644
--- a/Makefile
+++ b/Makefile
@@ -38,6 +38,7 @@ package-common:
 	cp -R --parents flexiapi/**/* $(OUTPUT_DIR)/flexisip-account-manager/
 	cp flexiapi/composer* $(OUTPUT_DIR)/flexisip-account-manager/flexiapi/
 	cp README.md $(OUTPUT_DIR)/flexisip-account-manager/
+	cp INSTALL.md $(OUTPUT_DIR)/flexisip-account-manager/
 	cp flexiapi/.env.example $(OUTPUT_DIR)/flexisip-account-manager/flexiapi/.env.example
 	cp flexiapi/artisan $(OUTPUT_DIR)/flexisip-account-manager/flexiapi/
 	cp flexiapi/phpunit.xml $(OUTPUT_DIR)/flexisip-account-manager/flexiapi/
diff --git a/README.md b/README.md
index 31b566d..e10f69f 100644
--- a/README.md
+++ b/README.md
@@ -21,122 +21,7 @@ Once deployed you can have access to the global and API documentation on the `/a
 
 # Setup
 
-## DotEnv configuration
-
-FlexiAPI relies on [DotEnv](https://github.com/vlucas/phpdotenv) to be configured. This configuration can be accessed using the existing `.env` file that can be itself overwritten by an environnement variables.
-
-Thoses variables can then be set using Docker-Compose, a bash script or a web-server for example.
-
-If you're installing FlexiAPI from the RPM package you can find the configuration file at `/etc/flexisip-account-manager/flexiapi.env`.
-
-## Manual setup
-
-Clone the repository, install the dependencies and generate a key.
-
-    composer install --no-dev
-    php artisan key:generate
-
-Then configure the database connection in the `.env` file (from the `.env.example` one). And migrate the tables. The migration *MUST* be run on an empty database. The `.env` file will be available at the root of the project or often located in `/etc/flexisip-account-manager` in packaged versions.
-
-    php artisan migrate
-
-You can also run the test suit using `phpunit`.
-
-To know more about the web server configuration part, you can directly [visit the official Laravel installation documentation](https://laravel.com/docs/8.x).
-
-### Apache2 server configuration
-
-The package will deploy a `flexisip-account-manager.conf` file in the apache2 configuration directory.
-This file can be loaded and configured in your specific VirtualHost configuration.
-
-### Configure the .env file
-
-Complete all the other variables in the `.env` file or by overwritting them in your Docker or web-server configuration:
-- The OVH SMS connector
-- SMTP configuration
-- App name, SIP domain…
-
-### Multi instances environement
-
-FlexiAPI can also handle multi domains setup.
-
-#### Multiple virtualhosts option
-
-In your web server configuration create several virtualhosts that are pointing to the same FlexiAPI instance.
-Using the environnement variables you can then configure FlexiAPI per instance.
-
-With Apache, use the [mod_env](https://httpd.apache.org/docs/2.4/mod/mod_env.html) module.
-
-    SetEnv APP_NAME "VirtualHost One"
-
-On nginx use `fastcgi_param` to pass the parameter directly to PHP.
-
-    location ~ [^/]\.php(/|$) {
-        …
-        include /etc/nginx/fastcgi_params;
-        fastcgi_param  APP_NAME     "VirtualHost Two";
-    }
-
-> **Warning** Do not create a cache of your configuration (using `artisan config:cache`) if you have a multi-environnement setup.
-> The cache is always having the priority on the variables set in the configuration files.
-
-#### Multiple .env option
-
-To do so, configure several web servers virtualhosts and set a specific `APP_ENV` environnement variable in each of them.
-
-Note that if `APP_ENV` is not set FlexiAPI will directly use the default `.env` file.
-
-FlexiAPI will then try to load a custom configuration file with the following name `.env.$APP_ENV`. So for the previous example `.env.foobar`.
-
-You can then configure your instances with specific values.
-
-    INSTANCE_COPYRIGHT="FooBar - Since 1997"
-    INSTANCE_INTRO_REGISTRATION="Welcome on the FooBar Server"
-    INSTANCE_CUSTOM_THEME=true
-    …
-
-#### Custom theme
-
-If you set `INSTANCE_CUSTOM_THEME` to true, FlexiAPI will try to load a CSS file located in `public/css/$APP_ENV.style.css`. If the file doesn't exists it will fallback to `public/css/style.css`.
-
-You can find an example CSS file at `public/css/custom.style.css`.
-
-#### Flexisip Push notifications pusher
-
-The API endpoint `POST /account_creation_tokens/send-by-push` uses the `flexisip_pusher` binary delivered by the [Flexisip](https://gitlab.linphone.org/BC/public/flexisip) project (and related package). You must configure the `APP_FLEXISIP_PUSHER_PATH` and `APP_FLEXISIP_PUSHER_FIREBASE_KEYSMAP` environnement variables to point to the correct binary.
-
-    APP_FLEXISIP_PUSHER_PATH=/opt/belledonne-communications/bin/flexisip_pusher
-
-This binary will be executed under "web user" privileges. Ensure that all the related files required by `flexisip_pusher` can be accessed using this user account.
-
-    /var/opt/belledonne-communications/log/flexisip/flexisip-pusher.log // Write permissions
-    /etc/flexisip/apn/*pem // Read permissions
-
-### SELinux restrictions
-
-If you are running on a CentOS/RedHat machine, please ensure that SELinux is correctly configured.
-
-Allow the webserver user to write in the `storage/` directory:
-
-    chcon -R -t httpd_sys_rw_content_t storage/
-
-Don't forget to make this change persistent if the directory may be relabeled :
-
-    semanage fcontext -a -t httpd_sys_rw_content_t storage/
-
-You can use the restorecon command to verify that this is working :
-
-    restorecon storage/
-
-If your database is located on a remote machine, you should also allow your webserver user to connect to remote hosts:
-
-    semanage port -a -t http_port_t -p tcp 3306 // Open remote connections on the MySQL port for example
-    setsebool -P httpd_can_network_connect 1 // Allow remote network connected
-    setsebool -P httpd_can_network_connect_db 1 // Allow remote database connection
-
-If you are planning to send emails using your account manager:
-
-    setsebool -P httpd_can_sendmail 1 // Allow email to be sent
+Check the `INSTALL.md` file.
 
 ## Usage
 
@@ -152,7 +37,7 @@ FlexiAPI is shipped with several console commands that you can launch using the
 
 Create or update a Space, required to then create accounts afterward. The `super` option enable/disable the domain as a super domain.
 
-    php artisan spaces:create-update {domain} {--super}
+    php artisan spaces:create-update {sip_domain} {host} {--super}
 
 ### Create an admin account
 
diff --git a/flexiapi/app/Http/Controllers/Account/DeviceController.php b/flexiapi/app/Http/Controllers/Account/DeviceController.php
index 202d061..38ab6bb 100644
--- a/flexiapi/app/Http/Controllers/Account/DeviceController.php
+++ b/flexiapi/app/Http/Controllers/Account/DeviceController.php
@@ -21,13 +21,13 @@ namespace App\Http\Controllers\Account;
 
 use App\Http\Controllers\Controller;
 use Illuminate\Http\Request;
-use App\Libraries\FlexisipConnector;
+use App\Libraries\FlexisipRedisConnector;
 
 class DeviceController extends Controller
 {
     public function index(Request $request)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
 
         return view(
             'account.device.index',
@@ -40,7 +40,7 @@ class DeviceController extends Controller
 
     public function delete(Request $request, string $uuid)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
 
         return view(
             'account.device.delete',
@@ -54,7 +54,7 @@ class DeviceController extends Controller
 
     public function destroy(Request $request)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
         $connector->deleteDevice($request->user()->identifier, $request->get('uuid'));
 
         return redirect()->route('account.device.index');
diff --git a/flexiapi/app/Http/Controllers/Admin/AccountDeviceController.php b/flexiapi/app/Http/Controllers/Admin/AccountDeviceController.php
index 2952c3f..3e4a2a3 100644
--- a/flexiapi/app/Http/Controllers/Admin/AccountDeviceController.php
+++ b/flexiapi/app/Http/Controllers/Admin/AccountDeviceController.php
@@ -22,13 +22,13 @@ namespace App\Http\Controllers\Admin;
 use App\Account;
 use App\Http\Controllers\Controller;
 use Illuminate\Http\Request;
-use App\Libraries\FlexisipConnector;
+use App\Libraries\FlexisipRedisConnector;
 
 class AccountDeviceController extends Controller
 {
     public function index(int $accountId)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
         $account = Account::findOrFail($accountId);
 
         return view(
@@ -42,7 +42,7 @@ class AccountDeviceController extends Controller
 
     public function delete(int $accountId, string $uuid)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
         $account = Account::findOrFail($accountId);
 
         return view(
@@ -57,7 +57,7 @@ class AccountDeviceController extends Controller
 
     public function destroy(Request $request, int $accountId)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
         $account = Account::findOrFail($accountId);
 
         $connector->deleteDevice($account->identifier, $request->get('uuid'));
diff --git a/flexiapi/app/Http/Controllers/Api/Account/DeviceController.php b/flexiapi/app/Http/Controllers/Api/Account/DeviceController.php
index e3d18ad..7123e63 100644
--- a/flexiapi/app/Http/Controllers/Api/Account/DeviceController.php
+++ b/flexiapi/app/Http/Controllers/Api/Account/DeviceController.php
@@ -20,7 +20,7 @@
 namespace App\Http\Controllers\Api\Account;
 
 use App\Http\Controllers\Controller;
-use App\Libraries\FlexisipConnector;
+use App\Libraries\FlexisipRedisConnector;
 use Illuminate\Http\Request;
 use stdClass;
 
@@ -28,14 +28,14 @@ class DeviceController extends Controller
 {
     public function index(Request $request)
     {
-        $devices = (new FlexisipConnector)->getDevices($request->user()->identifier);
+        $devices = (new FlexisipRedisConnector)->getDevices($request->user()->identifier);
 
         return ($devices->isEmpty()) ? new stdClass : $devices;
     }
 
     public function destroy(Request $request, string $uuid)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
 
         return $connector->deleteDevice($request->user()->identifier, $uuid);
     }
diff --git a/flexiapi/app/Http/Controllers/Api/Admin/DeviceController.php b/flexiapi/app/Http/Controllers/Api/Admin/DeviceController.php
index 9a02eb5..f5ab7f1 100644
--- a/flexiapi/app/Http/Controllers/Api/Admin/DeviceController.php
+++ b/flexiapi/app/Http/Controllers/Api/Admin/DeviceController.php
@@ -20,7 +20,7 @@
 namespace App\Http\Controllers\Api\Admin;
 
 use App\Http\Controllers\Controller;
-use App\Libraries\FlexisipConnector;
+use App\Libraries\FlexisipRedisConnector;
 use App\Account;
 use stdClass;
 
@@ -28,14 +28,14 @@ class DeviceController extends Controller
 {
     public function index(int $accountId)
     {
-        $devices = (new FlexisipConnector)->getDevices(Account::findOrFail($accountId)->identifier);
+        $devices = (new FlexisipRedisConnector)->getDevices(Account::findOrFail($accountId)->identifier);
 
         return ($devices->isEmpty()) ? new stdClass : $devices;
     }
 
     public function destroy(int $accountId, string $uuid)
     {
-        $connector = new FlexisipConnector;
+        $connector = new FlexisipRedisConnector;
 
         return $connector->deleteDevice(Account::findOrFail($accountId)->identifier, $uuid);
     }
diff --git a/flexiapi/app/Libraries/FlexisipPusherConnector.php b/flexiapi/app/Libraries/FlexisipPusherConnector.php
index 47a1447..1e5f488 100644
--- a/flexiapi/app/Libraries/FlexisipPusherConnector.php
+++ b/flexiapi/app/Libraries/FlexisipPusherConnector.php
@@ -64,14 +64,14 @@ class FlexisipPusherConnector
         }
     }
 
-    public function sendToken(string $token)
+    public function sendToken(string $token): bool
     {
         $payload = json_encode(['token' => $token]);
 
-        $this->send(payload: $payload);
+        return $this->send(payload: $payload);
     }
 
-    public function send(?string $payload = null, ?string $callId = null, ?string $type = 'background')
+    public function send(?string $payload = null, ?string $callId = null, ?string $type = 'background'): bool
     {
         if (!empty($this->pusherPath)) {
             $command = $this->pusherPath
@@ -96,11 +96,24 @@ class FlexisipPusherConnector
             }
 
             $output = null;
-            $retval = null;
+            $result = null;
 
-            return exec($command, $output, $retval);
+            exec($command . ' 2>&1', $output, $result);
+
+            if ($result > 0) {
+                Log::error('Flexisip Pusher error', [
+                    'command' => $command,
+                    'output' => $output
+                ]);
+
+                return false;
+            }
+
+            return true;
         }
 
-        Log::error('Pusher path not configured');
+        Log::error('Flexisip Pusher path not configured');
+
+        return false;
     }
 }
diff --git a/flexiapi/app/Libraries/FlexisipConnector.php b/flexiapi/app/Libraries/FlexisipRedisConnector.php
similarity index 98%
rename from flexiapi/app/Libraries/FlexisipConnector.php
rename to flexiapi/app/Libraries/FlexisipRedisConnector.php
index 7007d43..47e0d58 100644
--- a/flexiapi/app/Libraries/FlexisipConnector.php
+++ b/flexiapi/app/Libraries/FlexisipRedisConnector.php
@@ -24,7 +24,7 @@ use Illuminate\Support\Facades\Redis;
 use Illuminate\Support\Facades\Log;
 use stdClass;
 
-class FlexisipConnector
+class FlexisipRedisConnector
 {
     public function getDevices(string $from)
     {
diff --git a/flexisip-account-manager.spec b/flexisip-account-manager.spec
index f133880..d8bee04 100644
--- a/flexisip-account-manager.spec
+++ b/flexisip-account-manager.spec
@@ -49,6 +49,7 @@ cp -R flexiapi "$RPM_BUILD_ROOT%{opt_dir}"
 cp flexiapi/composer.json "$RPM_BUILD_ROOT%{opt_dir}/flexiapi"
 
 cp README* "$RPM_BUILD_ROOT%{opt_dir}/"
+cp INSTALL* "$RPM_BUILD_ROOT%{opt_dir}/"
 mkdir -p $RPM_BUILD_ROOT/etc/cron.daily
 
 mkdir -p $RPM_BUILD_ROOT%{apache_conf_path}
@@ -129,6 +130,7 @@ fi
 %files
 %{opt_dir}/flexiapi/
 %{opt_dir}/README*
+%{opt_dir}/INSTALL*
 
 %exclude %{opt_dir}/flexiapi/storage/
 
diff --git a/httpd/flexisip-account-manager.conf b/httpd/flexisip-account-manager.conf
index 5f7ca53..05a0cb0 100644
--- a/httpd/flexisip-account-manager.conf
+++ b/httpd/flexisip-account-manager.conf
@@ -1,4 +1,4 @@
-Alias /flexiapi /opt/belledonne-communications/share/flexisip-account-manager/flexiapi/public
+DocumentRoot /opt/belledonne-communications/share/flexisip-account-manager/flexiapi/public
 
 <Directory /opt/belledonne-communications/share/flexisip-account-manager/flexiapi/public>
     AllowOverride All
@@ -27,8 +27,6 @@ Alias /flexiapi /opt/belledonne-communications/share/flexisip-account-manager/fl
         RewriteCond %{REQUEST_FILENAME} !-d
         RewriteCond %{REQUEST_FILENAME} !-f
         RewriteRule ^ index.php [L]
-
-        RewriteBase /flexiapi/
     </IfModule>
 
 </Directory>