Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /home/atsysten/test.atsystens.com/app/index.php on line 3

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /home/atsysten/test.atsystens.com/app/index.php:3 Stack trace: #0 /home/atsysten/test.atsystens.com/app/index.php(3): mysqli_connect('db', 'php_docker', Object(SensitiveParameterValue), 'php_docker') #1 {main} thrown in /home/atsysten/test.atsystens.com/app/index.php on line 3