Fix wallpaper upload issues: add wallpaper column, update Docker config for proper file handling

docker-compose.yml

@@ -7,10 +7,12 @@ services:
     ports:
       - "3000:3000"
     volumes:
-      - data:/app
+      - data:/app/database
+      - uploads:/app/uploads
     environment:
       - NODE_ENV=development
     restart: unless-stopped
 
 volumes:
-  data: 
+  data:
+  uploads: