fix: correct volume names and dollar escaping in docker-stack.yml

ummah-wordpress/docker-stack.yml

@@ -42,7 +42,7 @@ services:
         define('WP_MEMORY_LIMIT', '256M');
         define('WP_HOME', 'https://ummah2.falahos.my');
         define('WP_SITEURL', 'https://ummah2.falahos.my');
-        $_SERVER['HTTPS'] = 'on';
+        $$_SERVER['HTTPS'] = 'on';
         define('FORCE_SSL_ADMIN', true);
     volumes:
       - ummah2-wp-data:/var/www/html
@@ -77,7 +77,7 @@ networks:
 volumes:
   ummah2-db-data:
     external: true
-    name: ummah2-db-data
+    name: ummah-wordpress_ummah2-db-data
   ummah2-wp-data:
     external: true
-    name: ummah2-wp-data
+    name: ummah-wordpress_ummah2-wp-data