Add config parameter for custom database port

app/ServiceProvider/DatabaseProvider.php

@@ -79,6 +79,7 @@ class DatabaseProvider implements ServiceProviderInterface
             'password' => DB_PASSWORD,
             'database' => DB_NAME,
             'charset'  => 'utf8',
+            'port'     => DB_PORT,
         ));
     }
 
@@ -97,6 +98,7 @@ class DatabaseProvider implements ServiceProviderInterface
             'username' => DB_USERNAME,
             'password' => DB_PASSWORD,
             'database' => DB_NAME,
+            'port'     => DB_PORT,
         ));
     }
 }

app/constants.php

@@ -21,6 +21,7 @@ defined('DB_USERNAME') or define('DB_USERNAME', 'root');
 defined('DB_PASSWORD') or define('DB_PASSWORD', '');
 defined('DB_HOSTNAME') or define('DB_HOSTNAME', 'localhost');
 defined('DB_NAME') or define('DB_NAME', 'kanboard');
+defined('DB_PORT') or define('DB_PORT', null);
 
 // LDAP configuration
 defined('LDAP_AUTH') or define('LDAP_AUTH', false);