fix(cron): Fix sentry-cleanup entrypoint issue (#861)

Fixes #860 and adds a test case to ensure all cleanup jobs are working.

Author: BYK

docker-compose.yml

@@ -219,6 +219,7 @@ services:
       context: ./cron
       args:
         BASE_IMAGE: "$SENTRY_IMAGE"
+    entrypoint: "/entrypoint.sh"
     command: '"0 0 * * * gosu sentry sentry cleanup --days $SENTRY_EVENT_RETENTION_DAYS"'
   nginx:
     <<: *restart_policy

test.sh

@@ -113,3 +113,7 @@ do
   echo "Pass."
 done
 echo "::endgroup::"
+
+echo "::group::Ensure cleanup crons are working ..."
+docker-compose ps | grep -q -- "-cleanup_.\+[[:space:]]\+Up[[:space:]]\+"
+echo "::endgroup::"