fix(docker): fix the permissions issue when running Docker Compose

Docker Compose mount the volumes as root by default and the node user can't access the SQLite DB (read-only)

docker-compose.yaml

@@ -12,6 +12,8 @@ services:
   perplexica-backend:
     build:
       context: .
+      args:
+        - USER=root
       dockerfile: backend.dockerfile
     image: itzcrazykns1337/perplexica-backend:main
     depends_on: