PostgreSQL Support (#4486)

Co-authored-by: Matthew Penner <matthew@pterodactyl.io>

config/database.php

@@ -57,6 +57,21 @@ return [
                 PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => env('MYSQL_ATTR_SSL_VERIFY_SERVER_CERT', true),
             ]) : [],
         ],
+
+        'pgsql' => [
+            'driver' => 'pgsql',
+            'url' => env('DATABASE_URL'),
+            'host' => env('DB_HOST', '127.0.0.1'),
+            'port' => env('DB_PORT', '5432'),
+            'database' => env('DB_DATABASE', 'panel'),
+            'username' => env('DB_USERNAME', 'pterodactyl'),
+            'password' => env('DB_PASSWORD', ''),
+            'charset' => 'utf8',
+            'prefix' => env('DB_PREFIX', ''),
+            'prefix_indexes' => true,
+            'search_path' => 'public',
+            'sslmode' => 'prefer',
+        ],
     ],
 
     /*