update frontend pre-commit hook

.tests/pre-commit-frontend.sh

@@ -5,7 +5,7 @@ UI_DIR="./hyperglass/ui"
 if git diff --cached --name-only | grep --quiet $UI_DIR
 then
     cd $UI_DIR
-    yarn typecheck
+    node_modules/.bin/tsc
 else
     echo "No frontend files have changed, skipping pre-commit check..."
     exit 0

hyperglass/ui/nextdev.js

@@ -8,6 +8,7 @@ const config = require(String(configFile));
 
 const { NODE_ENV: env, _HYPERGLASS_URL_: envUrl } = config;
 
+// testing
 const devProxy = {
   '/api/query/': { target: envUrl + 'api/query/', pathRewrite: { '^/api/query/': '' } },
   '/images': { target: envUrl + 'images', pathRewrite: { '^/images': '' } },