Docker + Django + React environment construction

FROM python:3.9.0
ENV PYTHONUNBUFFERED 1
RUN mkdir /backend
WORKDIR /backend
ADD requirements.txt /backend/
RUN pip install -r requirements.txt
ADD . /backend/

FROM node:12.19.0
RUN mkdir /frontend
WORKDIR /frontend
RUN npm install -g create-react-app

Django==3.1
psycopg2

version: '3'

services:
  db:
    image: postgres
    environment: 
      POSTGRES_PASSWORD: password
  django:
    build: .
    command: python3 manage.py runserver 0.0.0.0:8000
    volumes:
      - ./backend:/backend
    ports:
      - "8000:8000"
    depends_on:
      - db
  
  react:
    build:
      context: .
      dockerfile: "./Dockerfile-nodejs"
    volumes:
      - .:/frontend
    command: >
        cd frontend && yarn start
    ports:
      - "3000:3000"

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