--dockerized_app
--celery_app
    --app
         --__init__.py
         --routes.py
         --modules.py
         --celery_endpoints.py
    run.py
    config.py
Dockerfile
requeriments.txt
docker-compose.yml

export FLASK_APP=run.py
flask run

celery -A run.celery worker --loglevel=info

FROM python:3
ADD requirements.txt /app/requirements.txt
ADD ./celery_app/ /app/
WORKDIR /app/
RUN pip install -r requirements.txt
ENTRYPOINT celery -A celery_app worker --loglevel=info

version: '3'
services:

    rabbit:
        hostname: rabbit
        image: rabbitmq:latest
        environment:
            - RABBITMQ_DEFAULT_USER=admin
            - RABBITMQ_DEFAULT_PASS=mypass
        ports:
            - "5673:5672"

    worker:
        build:
            context: .
            dockerfile: dockerfile
        volumes:
            - .:/app
        links:
            - rabbit
        depends_on:
            - rabbit

Flask==1.0.2
Flask-SQLAlchemy==2.3.2
SQLAlchemy==1.2.7
celery==4.2.1

rabbit uses an image, skipping
Building worker
Step 1/6 : FROM python:3
 ---> 746a826ed9d7
Step 2/6 : ADD requirements.txt /app/requirements.txt
ERROR: Service 'worker' failed to build: ADD failed:
stat /var/lib/docker/tmp/docker-
builder480107603/requirements.txt: no such file or
directory