Use custom init script instead of postinstall (#5384)

* Use custom init script instead of postinstall

* Revert changes to start scripts in src\electron

* feat: add --ignore-scripts flag to npm install commands in batch and shell scripts

* feat: add --ignore-scripts flag to npm ci in Dockerfile

UpdateForkAndStart.bat

@@ -102,7 +102,8 @@ if %errorlevel% neq 0 (
 
 echo Installing npm packages and starting server
 set NODE_ENV=production
-call npm install --no-save --no-audit --no-fund --loglevel=error --no-progress --omit=dev
+call npm install --no-save --no-audit --no-fund --loglevel=error --no-progress --omit=dev --ignore-scripts
+call npm run init
 node server.js %*
 
 :end