Streamline docker setup a bit more (#264)

* docker: Take user creation off developers' shoulders

* docker: Turn mysite/celery.py into a static file

* readme: Advertise 127.0.0.1 rather than (working but weird) 0.0.0.0

README.rst

@@ -272,11 +272,11 @@ pip command::
 Developing django-celery-beat
 -----------------------------
 
-To spin up a local development copy of django-celery-beat with Django admin at http://0.0.0.0:58000/admin/ run::
+To spin up a local development copy of django-celery-beat with Django admin at http://127.0.0.1:58000/admin/ run::
 
-    $ docker-compose build
-    $ docker-compose run django python3 manage.py createsuperuser
-    $ docker-compose up
+    $ docker-compose up --build
+
+Log-in as user ``admin`` with password ``admin``.
 
 
 TZ Awareness:

docker/base/Dockerfile

@@ -10,6 +10,7 @@ RUN apt-get update && apt-get install --yes --no-install-recommends \
 
 RUN pip3 install --user \
         celery \
+        django-createsuperuserwithpassword \
         psycopg2-binary
 
 COPY setup.cfg setup.py   /app/
@@ -32,7 +33,6 @@ WORKDIR /mysite/
 RUN echo 'DATABASES = {"default": {"ENGINE": "django.db.backends.postgresql", "NAME": "postgres", "USER": "postgres", "HOST": "postgres", "PORT": 5432}}' >> mysite/settings.py
 RUN echo 'ALLOWED_HOSTS = ["*"]' >> mysite/settings.py
 RUN echo 'INSTALLED_APPS += ("django_celery_beat", )' >> mysite/settings.py
+RUN echo 'INSTALLED_APPS += ("django_createsuperuserwithpassword", )' >> mysite/settings.py
 
-RUN echo 'from celery import Celery' > mysite/celery.py
-RUN echo 'import os; os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")' >> mysite/celery.py
-RUN echo 'app = Celery("mysite")' >> mysite/celery.py
+COPY docker/base/celery.py mysite/celery.py

docker/base/celery.py

@@ -0,0 +1,10 @@
+# Copyright (C) 2019 Sebastian Pipping <[email protected]>
+# Licensed under the BSD License (3 clause, also known as the new BSD license)
+
+import os
+
+from celery import Celery
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')
+
+app = Celery('mysite')

docker/django/entrypoint.sh

@@ -11,4 +11,10 @@ wait-for-it postgres:5432
 
 python3 manage.py migrate
 
+python3 manage.py createsuperuserwithpassword \
+        --username admin \
+        --password admin \
+        --email [email protected] \
+        --preserve
+
 exec "$@"