Fatal error: Uncaught mysqli_sql_exception: Connection refused in /var/www/html/core/database.php:21 Stack trace: #0 /var/www/html/core/database.php(21): mysqli->__construct('betterstack-db', 'root', Object(SensitiveParameterValue), 'betterstack_tes...') #1 /var/www/html/core/app.php(35): Database->connect(Array) #2 /var/www/html/core/app.php(63): App->__construct() #3 /var/www/html/index.php(3): require('/var/www/html/c...') #4 {main} thrown in /var/www/html/core/database.php on line 21