Configuring docker-compose.yaml for vue, redis and django [closed]

I plan to run the application with one command from the terminal. However, when configuring docker-compose.yaml I have encountered many problems and gaps in my knowledge. At last I have compiled this file and realized that only redis works and the rest does not start. The Django works on the postgresql and the redis is needed only for the normal work of the celery which I don't want to add to docker

yet

Annex structure

  • docker-compose.yaml
  • src/web/static/museum/(application front end in vue.js)
  • src/manage.py
  • python/Dockerfile
  • vue-js/Dockerfile

    • python/Dockerfile

    FROM python:3.8

ENV PYTHONUNBUFFERED 1

RUN pip install poetry==1.1.8 && poetry config virtualenvs.create false

WORKDIR /app
COPY pyproject.toml .
RUN poetry install

COPY . .

RUN python src/manage.py collectstatic --no-input

EXPOSE 8000

CMD python src/manage.py migrate && python src/manage.py runserver 0.0.0.0:8000

    vue-js/Dockerfile

    FROM node:lts-alpine

WORKDIR /app/src/web/static/museum

RUN npm run serve

CMD ["npm", "run", "serve"]

    docker-compose.yaml

    version: '3'

services:

  redis:
    image: redis:6-alpine
    ports:
      - 6379:6379

  vue:
    image: node:lts-alpine
    build:
      context: ./vue-js
      dockerfile: Dockerfile
    ports:
      - 8080:8080
    restart: always

   app:
    image: django3.2:latest
    build:
      context: ./python
      dockerfile: Dockerfile
    depends_on:
      - redis
    environment:
      DB_USER: user
      DB_NAME: name
      DB_PASSWORD: password
      CELERY_BROKER_URL: redis://redis:6379/0
    restart: always

    at startup docker-compose.yaml gives out an error

    app_1    |     connection = Database.connect(**conn_params)
app_1    |   File "/usr/local/lib/python3.8/site-packages/psycopg2/__init__.py", line 122, in connect
app_1    |     conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
app_1    | django.db.utils.OperationalError: could not connect to server: Connection refused
app_1    |      Is the server running on host "127.0.0.1" and accepting
app_1    |      TCP/IP connections on port 5432?
app_1    |
app_1 exited with code 1

    What exactly is the error?

    Thanks in advance!

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