Simplified docker-compose for https://stackoverflow.com/questions/53793868/how-to-connect-to-mongodb-container-with-golang-web-app-inside-at-another-contai

README.md

• No need for a dedicated network: docker compose autmatically sets one up for you
• No need to export MongoDB's port: you can access it via docker exec -it test_mongodb_1 mongo

docker-compose.yml

version: "3"
services:

  mongodb:
    image: mongo
    volumes:
      - mongodata:/data/db
  
  microservice:
    depends_on:
      - mongodb
    build: .  
    image: cloud-native-go:v1
    environment:
      - PORT=9090
    ports:
      - 9090:9090

volumes:
  mongodata: