Updated README

README.md

@@ -2,25 +2,62 @@
 
 ## Development
 
-### Testing
+Cascade should work with Python 3.10 / 3.11 although other versions could work. Dependencies should first be installed with:
 
-For unit tests:
+```
+pip install -r requirements.txt
+```
+
+## Testing
+
+The `pip install` command should have installed a suitable version of `pytest`.
+
+```
+pytest --version
+```
+
+Depending on your python install you may have to run `python -m pytest` instead.
+
+### Unit Tests
+
+For unit tests, you can run the following command:
 
 ```
 pytest
 ```
 
-Integration tests require Kafka to be running (with `docker compose up`):
+
+### Integration Tests
+
+Integration tests require the Kafka service to be running. 
+You can launch it with:
+
+```
+docker compose up -d
+```
+
+This will launch:
+- a Kafka broker at localhost:9092 and,
+- a [Kafbat UI](https://github.com/kafbat/kafka-ui) at http://localhost:8080
+
+Before running integration tests, it's best to purge all existing messages.
+This can be done in the Kafbat UI (under the `Topics` tab) or by fully 
+restarting the container:
 
 ```
-pytest -m integration
+docker compose down
+docker compose up -d
 ```
 
+You should then be able to run integration tests with the following command:
+
+```
+pytest -m integration
+```
 
-### Documentation
+## Documentation
 
-Documentation is done with [Google style docstrings](https://google.github.io/styleguide/pyguide.html) in the source code. 
-It can be generated using [pdoc](https://pdoc.dev/docs/pdoc.html):
+Documentation can be generated using [pdoc](https://pdoc.dev/docs/pdoc.html):
 
 ```
 pdoc --mermaid src/cascade