First draft of README

Procfile

@@ -1 +1,2 @@
-web: gunicorn application.wsgi
+web: gunicorn application.wsgi
+worker: celery worker --app=application.celery

README.md

@@ -30,7 +30,12 @@ Heroku one.
 #### First steps
 
 1. Login to your Heroku account from the console using `heroku login`.
-2. Create a new Heroku project with `heroku create [APP_NAME]`.
+2. Create a new Heroku project with `heroku create [APP_NAME]`. 
+   This command allows to have several 
+3. Provision a PostgreSQL database with 
+   `heroku addons:create heroku-postgresql:hobby-dev`.
+4. Provision a RabbitMQ task queue with `heroku addons:create cloudamqp:lemur` 
+   (that requires to have a credit card configured on Heroku).
 
 ### Choosing Celery broker
 
@@ -68,6 +73,8 @@ be used as a base for different environments. Providing a postfix to the file
 name, like ".env.production" is a common strategy, and we'll do so in all the
 examples below.
 
+See: https://devcenter.heroku.com/articles/multiple-environments
+
 ### Important files
 
 ## Application structure

application/celery.py

@@ -0,0 +1,17 @@
+import os
+
+from celery import Celery
+
+# set the default Django settings module for the "celery" program.
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "application.settings")
+
+app = Celery("tasks")
+
+# Using a string here means the worker doesn"t have to serialize
+# the configuration object to child processes.
+# - namespace="CELERY" means all celery-related configuration keys
+#   should have a `CELERY_` prefix.
+app.config_from_object("django.conf:settings", namespace="CELERY")
+
+# Load task modules from all registered Django app configs.
+app.autodiscover_tasks()

application/settings.py

@@ -162,4 +162,21 @@
 
 STATIC_URL = "/static/"
 
-STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
+STATICFILES_STORAGE = "whitenoise.storage.CompressedManifestStaticFilesStorage"
+
+# Celery configuration
+
+CELERY_BROKER_URL = os.environ.get("BROKER_URL")
+
+CELERY_RESULT_BACKEND = CELERY_BROKER_URL
+
+CELERY_BEAT_SCHEDULE = {
+    #
+    # A list of scheduled tasks
+    #
+    # "your-complex-task-name": {
+    #     "task": "task_function_name",
+    #     "schedule": 60.0,
+    # }
+    #
+}