Error: failed to connect to [mongo:27017]

[knvpk]

Hi, im getting this error while running with docker, here is my docker-compose file and im using develop branch code.

mongo:
   image: mongo

   volumes:
     - ./data/runtime/db:/data/db
     - ./data/dump:/dump
   command: mongod --smallfiles

rocketchat:
  image: rocketchat/rocket.chat:develop
  volumes:
   - ./uploads:/app/uploads
 environment:
  - ROOT=3000
  - ROOT_URL=http://rocket.invizoserver.com
  - MONGO_URL=mongodb://mongo:27017/rocketchat
  - mongo:mongo
ports:
  - 3000:3000
restart: always

extra_hosts:
- "git.invizoserver.com:192.168.0.222"

is there any wrong in docker compose if not please help to work with this.

[knvpk]

Sorry, im missing links param.