Overall: I don't want my django app to rely on a docker container as my db. In other words, when I run an image
docker run -p 8000:8000 -d imagename
I want this to know to connect to my local db. I have my settings.py configured to connect to a pg db, so everything is fine when I do something like
python manage.py runserver
Feel free to call out any incorrect use of certain terms or just my overall understanding of docker. So from all the tutorials I've seen they usually make a docker compose file that is reliant on a db-image that will be spun up in a container separate from the web app. Examples of things I've gone through: https://docs.docker.com/compose/django/#connect-the-database, http://ruddra.com/2016/08/14/docker-django-nginx-postgres/, etc. At this point I'm extremely lost, since I don't know if I do this in my Dockerfile, settings.py in my project, or docker-compose.yml (I'm guessing I shouldn't even have this since this is for a multi-container app which I'm trying to avoid). [Aside: Lastly, can one run a django app reliant on celery & rabbitmq in just one container? Like my pg example I only see instances of having them all in separate containers.] As for my Dockerfile it's pretty much this.
FROM python:3
ENV APP 'http://githubproj`
RUN git clone $APP \
&& cd $APP/projectitself \
&& pip install -r requirements.txt
CMD cd $APP_DIR/mydjangoproject && gunicorn mydjangoproject.wsgi:application --bind 0.0.0.0:8000