Fatal error: Uncaught PDOException: PDO::__construct(): php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /var/www/html/includes/config.php:11 Stack trace: #0 /var/www/html/includes/config.php(11): PDO->__construct('mysql:host=db;d...', 'root', Object(SensitiveParameterValue), Array) #1 /var/www/html/index.php(2): db() #2 {main} Next PDOException: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo for db failed: Name or service not known in /var/www/html/includes/config.php:11 Stack trace: #0 /var/www/html/includes/config.php(11): PDO->__construct('mysql:host=db;d...', 'root', Object(SensitiveParameterValue), Array) #1 /var/www/html/index.php(2): db() #2 {main} thrown in /var/www/html/includes/config.php on line 11