Investigate increasing memory usage on `isiscloudwin` machines

[robertapplin]

It is possible that the memory being used on the isiscloudwin machines is gradually going up over time. We should investigate if this is the case, and find out why. Ideally, we shouldn't need to keep cleaning up the system manually when it runs out of memory.

Useful command docker system df and docker system prune -a. The memory used up by the containers is probably where the problem lies (if there is a problem).

[robertapplin]

It turns the memory was filled up by images and containers left over from development