message: add mongo uri
diff: version: "3"
  services:
  + mongo:
  + image: mongo:latest
  + hostname: mongo
  + ports:
  + - 27017:27017
  +
  nodeosd:
  image: eosio/eos:latest
  - command: /opt/eosio/bin/nodeosd.sh --data-dir /opt/eosio/bin/data-dir
  + command: /opt/eosio/bin/nodeosd.sh --data-dir /opt/eosio/bin/data-dir --resync --mongodb-uri mongodb://mongo:27017/EOS
  hostname: nodeosd
  + links:
  + - mongo
  ports:
  - 8888:8888
  - 9876:9876
  