Dockerfile and docker-compose development example configuration for python Django+postgresql environment. Application runs on port 3000

docker-compose.yaml

version: '3'
services:
  db:
    image: postgres
    environment:
      POSTGRES_USER: postgres
      POSTGRES_DB: database_dev
      POSTGRES_PASSWORD: secret
      PGPASSWORD: secret
    ports:
      - "5432:5432"
    volumes:
      - ./project-dump/:/var/www/html # Optional .sql database dump file.
      - ./postgres-database:/var/lib/postgresql/data # Save container database data to your machine. 
    
  web:
    build: .
    command: python3 manage.py runserver 0.0.0.0:3000
    volumes:
      - .:/code # for development only
    ports:
      - "3000:3000"
    depends_on:
      - db

      

Dockerfile

FROM python:3.7.3-stretch
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
COPY requirements.txt /code/
RUN pip install -r requirements.txt
COPY . /code/
EXPOSE 3000