Celery Dockerfile Backend Not Found

[emanuelGitCodes]

Mold: Flask app that uses Celery

In the docker-compose.yml the celery container makes use of

  celery:
    container_name: celery
    build:
      context: .
      dockerfile: Dockerfile.backend
    command: ["celery", "-A", "lti_project", "worker", "--loglevel=info"]
    volumes:
      - .:/app
    depends_on:
      - redis

When the cookie mold is created, there is no file Dockerfile.backend

make start-attached
Starting udoit-captions-lti in attached mode
docker compose -f docker-compose.yml up
[+] Building 0.2s (4/4) FINISHED
 => [internal] load local bake definitions                                                                                       0.0s
 => => reading from stdin 1.26kB                                                                                                 0.0s
 => [celery internal] load build definition from Dockerfile.backend                                                              0.0s
 => => transferring dockerfile: 2B                                                                                               0.0s
 => [lti internal] load build definition from Dockerfile                                                                         0.0s
 => => transferring dockerfile: 342B                                                                                             0.0s
 => CANCELED [lti internal] load metadata for docker.io/library/python:3.12                                                      0.0s
[+] up 0/2
 ⠙ Image udoit-captions-lti-lti    Building                                                                                       0.3s
 ⠙ Image udoit-captions-lti-celery Building                                                                                       0.3s
target celery: failed to solve: failed to read dockerfile: open Dockerfile.backend: no such file or directory



View build details: docker-desktop://dashboard/build/default/default/ol6qwt5qvs3cdjj1yqvk5fu7u

make: *** [start-attached] Error 1

If I comment out the celery container, the project proceeds with the build.

[emanuelGitCodes]

To get the container to build successfully, I updated the lti container to

  lti:
    build:
      context: .
      args:
        - "REQUIREMENTS=${REQUIREMENTS}"
    working_dir: /app/lti
    command:
      [
        "gunicorn",
        "--conf",
        "../devops/gunicorn_conf.py",
        "--bind",
        "0.0.0.0:8000",
        "main:app",
      ]
    volumes:
      - .:/app
    ports:
      - "8000:8000"
    env_file:
      - .env
    environment:
      - MODULE_NAME=app
      - FLASK_APP=main.py
    depends_on:
      - redis