Fix: Cannot locally test azul-docker-elasticsearch changes (DataBiosp…

…here/azul#5986)

README.md

@@ -15,7 +15,13 @@ docker pull localhost:5000/docker.io/ucscgi/azul-elasticsearch:7.17.15-6
 # To examine the image for vulnerabilities, browse the image in Docker Desktop.
 # If an unnecessary package is found to have critical or high vulnerabilities,
 # add a `RUN` instruction to the Dockerfile to remove the package.
-# To test the image in Azul, run:
-(cd ../azul && azul_docker_elasticsearch_version=7.17.15-6 azul_docker_registry=localhost:5000/ make test)
+# To test the image in Azul, you will need to temporarily modify Azul's
+# `environment.py` to set the appropriate `azul_docker_images` value using the
+# full image name noted above (starting with "localhost"). With this change in
+# place, run:
+_refresh
+make image_manifests.json
+azul_docker_registry="" make test
+# Finally, back in your working tree for this repository:
 make stop_registry
 ```