app.dev.yml

version: '3.3'

services:
  app:
    build:
      dockerfile: config/docker/app.dockerfile
    depends_on:
      - db-default
      - redis
    volumes:
      - ../../:/app
      - /app/node_modules
    environment:
      DEBUG: 'True'
      DATABASE_URL: postgres://postgres@db-default/postgres
      REDIS_URL: redis://redis:6379/0

  # Development database (default)
  db-default:
    image: postgres:10-alpine
    volumes:
      - ../../_data/db-default:/var/lib/postgresql/data

  # Development cache
  redis:
    image: redis:3-alpine
    volumes:
      - ../../_data/redis:/data

app.dockerfile

FROM python:3.6-stretch
WORKDIR /app

# Install Node 8.x
RUN \
    curl -sL https://deb.nodesource.com/setup_8.x | bash - &&\
    apt-get install -y nodejs

# Install Node dependencies
COPY config/node/package.json /app/package.json
RUN npm install

# Install Python dependencies
COPY config/python/requirements.txt /app/requirements.txt
RUN pip install -r requirements.txt