Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for us-cdbr-east-06.cleardb.net failed: Name or service not known in /app/index.php on line 21

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for us-cdbr-east-06.cleardb.net failed: Name or service not known in /app/index.php:21 Stack trace: #0 /app/index.php(21): mysqli_connect() #1 {main} thrown in /app/index.php on line 21