Document ls blah

Author: BYK

action.yaml

@@ -62,6 +62,8 @@ runs:
         sudo chmod o+x /var/lib/docker
         sudo chmod -R o+rwx /var/lib/docker/volumes
         source ${{ github.action_path }}/.env
+        # See https://explainshell.com/explain?cmd=ls%20-Rv1rpq
+        # for that long `ls` command
         SENTRY_MIGRATIONS_MD5=$(docker run --rm --entrypoint bash $SENTRY_IMAGE -c 'ls -Rv1rpq src/sentry/migrations/' | md5sum | cut -d ' ' -f 1)
         echo "SENTRY_MIGRATIONS_MD5=$SENTRY_MIGRATIONS_MD5" >> $GITHUB_OUTPUT
         SNUBA_MIGRATIONS_MD5=$(docker run --rm --entrypoint bash $SNUBA_IMAGE -c 'ls -Rv1rpq snuba/snuba_migrations/**/*.py' | md5sum | cut -d ' ' -f 1)