.
├── docker-compose.override.yml
├── docker-compose.prod.yml
└── docker-compose.yml

$ docker-compose up

$ docker-compose \
    -f docker-compose.yml \
    -f docker-compose.prod.yml \
    up
# Works if not dependent on Swarm features

docker stack deploy \
    -c docker-compose.yml \
    -c docker-compose.prod.yml \
    test
# For Swarm deployments

version: "3.7"

services:
  cfml:
    image: "registry.gitlab.com/${CI_PROJECT_NAMESPACE}/starter-swarm-cfml/cfml:${BUILD_TAG:-latest}"
    build:
      context: .
      dockerfile: ./build/cfml/Dockerfile
    environment:
      PORT: 8080
      SSL_PORT: 8443
      cfconfigfile: .CFConfig.json
      cfconfig_inspectTemplate: never
    secrets:
      - source: cfml.admin.password
        target: cfml.admin.password
    ports:
      - target: 8080
        published: 80
      - target: 8443
        published: 443

networks:
  internal:
    driver: overlay

secrets:
  cfml.admin.password:
    external: true
    name: cfml.admin.password.v1

version: "3.7"

services:
  cfml:
    volumes:
      - ./app:/app
    environment:
      cfconfig_inspectTemplate: always
    ports:
      - target: 8080
        published: 8080
      - target: 8443
        published: 8443

networks:
  internal:
    driver: bridge

secrets:
  cfml.admin.password:
    external: false
    file: ./.secrets/cfml.admin.password.dev

# Create Docker Droplet
doctl compute droplet create test 
    --size 1gb 
    --image docker-18-04 
    --region nyc1

# List Droplets
doctl compute droplet list

#Delete a Droplet
doctl compute droplet delete 123456

#List SSH Key Ids and Names
doctl compute droplet list --format "ID,Name"

CI_PROJECT_NAMESPACE=mjclemente
OTHER_SETTING=
FOO=bar

version: "3.7"

services:
  cfml:
    image: "registry.gitlab.com/${CI_PROJECT_NAMESPACE}/starter-swarm-cfml/cfml:${BUILD_TAG:-latest}"
    build:
      context: .
      dockerfile: ./build/cfml/Dockerfile
    environment:
      PORT: 8080
      SSL_PORT: 8443
      cfconfigfile: .CFConfig.json
      cfconfig_inspectTemplate: never
      CF_ADMINPASSWORD: <<SECRET:cfml.admin.password>>
    secrets:
      - source: cfml.admin.password
        target: cfml.admin.password

{
    "adminPassword":"${CF_ADMINPASSWORD}",
    "applicationListener":"modern",
    "applicationMode":"curr2root",
    "applicationTimeout":"1,0,0,0",
    "cacheDefaultFile":"",
    "cacheDefaultFunction":"",
    "cacheDefaultHTTP":"",
    "cacheDefaultInclude":"",
    "cacheDefaultObject":"object",
    "cacheDefaultQuery":"",
    "cacheDefaultResource":"",
    "cacheDefaultTemplate":"",
    "cacheDefaultWebservice":"",
    "caches":{},
    "CGIReadOnly":"true",
    "clientCookies":"true",
    "clientManagement":"false",
    "clientTimeout":"90,0,0,0",

secrets:
  cfml.admin.password:
    external: true
    name: cfml.admin.password.v1

secrets:
  cfml.admin.password:
    external: false
    file: ./.secrets/cfml.admin.password.dev

version: "3.7"

services:
  cfml:
    ...
    environment:
      PORT: 8080
      SSL_PORT: 8443
      cfconfigfile: .CFConfig.json
      cfconfig_inspectTemplate: never
      CF_ADMINPASSWORD: <<SECRET:cfml.admin.password>>
    secrets:
      - source: cfml.admin.password
        target: cfml.admin.password

before_script:
## We're gonna log into the gitlab registry, as that's where these images are stored
  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.gitlab.com
## Git needed to get the date from the commit sha
  - apk add git
## So we can see what's going on in the logs
  - docker info
## setup environment variables
  - [configuration continues]

before_script:
  - [earlier configuration]
  ## Use git `show` with --format=%ci to get ISO 8601 date
  - export COMMIT_TIME=$(git show -s --format=%ci $CI_COMMIT_SHA)
  ## Use first 10 characters of the datetime (ie: 2019-03-19)
  - export COMMIT_TIME_SHORT=$(echo $COMMIT_TIME | head -c10) 
  - export BUILD_TAG="${COMMIT_TIME_SHORT}_$CI_COMMIT_SHORT_SHA"

deploy:
  stage: deploy
  only:
    - deploy
  except:
    variables:
      - $CI_COMMIT_MESSAGE =~ /Initial commit/i
      - $CI_COMMIT_MESSAGE =~ /skip deploy/i
      - $CI_COMMIT_MESSAGE =~ /don't deploy/i

build:
  stage: build
  only:
    - deploy
  script:
    ## Build the image, with the build tag and the latest tag
    - docker build --tag $CONTAINER_IMAGE:$BUILD_TAG --tag $CONTAINER_IMAGE:latest -f ./build/cfml/Dockerfile .
    ## List images, so we can confirm success
    - docker image ls
    ## Push with the build tag
    - docker push $CONTAINER_IMAGE:$BUILD_TAG
    ## Push with latest
    - docker push $CONTAINER_IMAGE:latest

deploy:
  stage: deploy
  script:
    - [a lot of SSH related config]
    ## Enable SSH functionality made possible in 18.0.9 to switch our context to the remote server
    - export DOCKER_HOST=ssh://root@${HOST_IP}
    ## Deploy the stack - registry auth is for gitlab
    - docker stack deploy -c docker-compose.yml -c docker-compose.prod.yml basetest --with-registry-auth