fix frontend ci test, add installer ci test job [skip ci]

.github/workflows/frontend.yml

@@ -26,5 +26,5 @@ jobs:
         run: yarn install
 
       - name: TypeScript Check
-        working-directory: ${{ end.working-directory }}
+        working-directory: ${{ env.working-directory }}
         run: yarn typecheck

.github/workflows/installer.yml

@@ -0,0 +1,17 @@
+name: Installer Testing
+on: [push, pull_request]
+
+jobs:
+  ci:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-20.04]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v2
+
+      - name: Run hyperglass
+        run: './install.sh'