Update TODO's

TODO's.txt

@@ -34,4 +34,17 @@ NB:  Had to update the prerun.py script as it was failing on check_solr_connecti
     - prod, from source: no change from source stage, but listed last so in case a stage isn't targeted, the builder will default to this stage 
     Also check out https://github.com/ckan/ckan/pull/4635 for Francesco's test stuff
 3.  CKAN Worker (maybe)
-4.  Implement SSL for the nginx container or include a howto in the docs
+4.  Implement SSL for the nginx container or include a howto in the docs
+
+
+### Container Canary notes
+
+A list of what tests to run on the Docker containers to verify they have been built correctly
+
+- Check the user name and the uid/gid
+- Check the ports the container is listening on
+- Check an httpget on the URL
+- any command can be executed in the running container every x minutes
+-
+-
+