Add instructions for running smoke test workflow

This commit adds instructions for running the smoke test workflow in the README.md file. The instructions include the necessary commands to prepare the environment and run the tests.

Signed-off-by: Paul Gaiduk <[email protected]>

README.md

@@ -281,6 +281,19 @@ Or to run the workflow tests:
 EDEN_TEST=small eden test tests/workflow -v debug
 ```
 
+Because most workflow tests already contain a setup phase you only need minimal preparation before running them - here is an example of running smoke test workflow (as done in `.github/actions/setup-environment/action.yml` and `.github/actions/run-eden-test/action.yml`):
+
+```console
+(optional) make clean
+make build
+make build-tests
+eden config add default
+eden setup
+eden test tests/workflow/ -s smoke.tests.txt
+```
+
+Here it is important not to do the setup with `make run`, because it doesn't include a call to `eden+ports.sh` that sets up port forwarding for the tests.
+
 For tests that accept parameters, simply pass them after the test path. For
 example, to run Log/Metrics/Info test
 in debug mode with timeout of 600 seconds and requiring 3 messages of each type: