Warning: mysqli::__construct(): php_network_getaddresses: getaddrinfo for chat-mysql failed: Name or service not known in /usr/share/nginx/html/index.php on line 10

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for chat-mysql failed: Name or service not known in /usr/share/nginx/html/index.php:10 Stack trace: #0 /usr/share/nginx/html/index.php(10): mysqli->__construct('chat-mysql', 'root', Object(SensitiveParameterValue), 'chat', '3306') #1 {main} thrown in /usr/share/nginx/html/index.php on line 10