fig.yml

gistfile1.txt

devserver:
  image: << production docker image name >>
  volumes:
    - .:/usr/src/app
  links:
    - db
    - redis
  environment:
    DEBUG: True
    DATABASE_URL: postgres://username:password@db:5432/dbname
    PYTHONDONTWRITEBYTECODE: 1
  ports:
    - "8000:80"

The image we specify already has all of the dependencies installed. This will break if your code introduces a new dependency. In our case, we're a Django app, so you'd need to update the image with the results of the new requirements.txt file; the dev might docker build -t << image name >> . and then fig build and then reset the stack.