More documentation.

README.md

@@ -2,6 +2,44 @@
 
 A Flask and Celery demo app.
 
+## Requirements
+
+- Docker
+- Docker Compose
+
+## Usage
+
+Start the application and rebuild if necessary:
+
+```
+docker-compose up --build
+```
+
+Stop the application:
+
+```
+docker-compose down
+```
+
+Stop the application and delete volumes (starting from scratch):
+
+```
+docker-compose down -v
+```
+
+Start a Python interperter inside the Flask web server container:
+
+```
+docker-compose exec server python
+```
+
+Post a message to the Flask web server for the Celery worker to output:
+
+```
+curl -H "Content-Type: application/json" -X post -d '{"message": "foo"}' http://localhost:8080/log
+```
+
+
 ## License
 
 This software is licensed under the MIT license (see `LICENSE.txt`).