a bit of a test-running guide in README

docker-testing/README.md

@@ -0,0 +1,23 @@
+The file `$REPO/.github/workflows/run-the-tests.yml`
+(where `$REPO` is the /path/to/local/python-irodsclient repository ...)
+contains commands for starting the server and client containers and running the PRC
+suite in response to a push or pull-request.
+
+The tests suite can also be run on any workstation with "docker compose" installed:
+
+   1. cd into top level of $REPO
+
+   2. run:
+      ```
+      ./docker-testing/start_containers.sh 3.6
+      ```
+      This builds and runs the docker images.  "3.6" is the version of python desired.
+
+   3. run:
+      ```
+      docker exec <name-of-python-client-container> /repo_root/docker_testing/run_tests.sh
+      ```
+      (Note:  `/repo_root` is an actual literal path, internal to the container.)
+      You'll see the test output displayed on the console.  At completion, xmlrunner outputs are in /tmp.
+
+   4. use `docker logs -f` with the provider instance name to tail the irods server log output