dockerize django app with postgres and pgadmin

docker-compose.yml

version: '3'

services:
  db:
    container_name: postgres_db
    image: postgres
    ports:
      - "5432:5432"

  web:
    container_name: server
    build: .
    command: python src/manage.py runserver 0.0.0.0:8000
    volumes:
    - .:/code
    ports:
    - 80:8000
    depends_on:
      - db

  pgadmin:
    container_name: pgadmin4_
    image: dpage/pgadmin4
    restart: always
    depends_on:
      - db
    ports:
      - 5555:80
    environment:
      PGADMIN_DEFAULT_EMAIL: pgadmin@example.com
      PGADMIN_DEFAULT_PASSWORD: admin

Dockerfile

FROM python:3

ENV PYTHONUNBUFFERED 1

RUN mkdir /code
WORKDIR /code
COPY . /code/

RUN pip install -r requirements.txt