I prefer to be there when container ar updated so that I can promptly fix anything that breaks.

I have 2 watchtower instances in a docker-compose, the first container ‘watchtower-monitor’ uses command: --monitor-only and warns me over gotify about the availability of updates but does not modify anything, the second ‘watchtower-once’ uses command: --run-once and it is usually inactive since it performs all updates once and than exits. When i am ready to update everything I just docker-compose start watchtower-once container to start the updates.

4gb ram is a bit low, mb that supports 16gb or 32gb of cheap RAM are ideal because it is possible to max the ram with little money. How much ram does it support?

https://github.com/devture/email2matrix

this is newer:

https://gitlab.com/etke.cc/postmoogle