Complete docker sample file for automated deployment to digital ocean.

wercker.yml

box: node

build:
  steps:
     - npm-install

deploy:
  steps:
    - script:
        name: install nodemon
        code: npm install -g nodemon
    - internal/docker-push:
        username: $DOCKER_USERNAME
        password: $DOCKER_PASSWORD
        cmd: /bin/bash -c "cd /pipeline/source && nodemon npm start"
        repository: $DOCKER_REPO
        registry: https://registry.hub.docker.com
    - add-ssh-key:
        keyname: DIGITAL_OCEAN
    - add-to-known_hosts:
        hostname: $SERVER_IP
    - script:
        name: pull latest image
        code: ssh root@$SERVER_IP docker pull $DOCKER_REPO:latest
    - script:
        name: stop running container
        code: ssh root@$SERVER_IP docker stop $APPLICATION_NAME || echo ‘failed to stop running container’
    - script:
        name: remove stopped container
        code: ssh root@$SERVER_IP docker rm $APPLICATION_NAME || echo ‘failed to remove stopped container’
    - script:
        name: remove image behind stopped container
        code: ssh root@$SERVER_IP> docker rmi $DOCKER_REPO:current || echo ‘failed to remove image behind stopped container’
    - script:
        name: tag newly pulled image
        code: ssh root@$SERVER_IP docker tag $DOCKER_REPO:latest $DOCKER_REPO:current || echo ‘failed to change tag’
    - script:
        name: run new container
        code: ssh root@$SERVER_IP docker run -d -p 80:$NODE_PORT --name $APPLICATION_NAME $DOCKER_REPO:current