[fix] [docker-compose] persist third party extensions

currently the third party extensions will get wiped on each container restart and also there is no way to re-import extensions

docker/docker-compose.yml

@@ -8,6 +8,7 @@ services:
     ports:
       - "8000:8000"
     volumes:
+      - "./extensions:/home/node/app/public/scripts/extensions/third-party"
       - "./config:/home/node/app/config"
       - "./user:/home/node/app/public/user"
     restart: unless-stopped