Warning: require(/app/config/db.php): Failed to open stream: Permission denied in /app/config/web.php on line 4

Fatal error: Uncaught Error: Failed opening required '/app/config/db.php' (include_path='.:/usr/local/lib/php') in /app/config/web.php:4 Stack trace: #0 /app/web/index.php(10): require() #1 {main} thrown in /app/config/web.php on line 4