Healthcheck in docker image

[denisz1]

Is your feature request related to a problem? Please describe.

Please add HEALTHCHECK as describe in here by piksel.

There was motivations in that thread showing why it is necessary even if it does not provide value to Watchtower. But it provide value to environment in general.

That issue is close, so I open this new tracking issue.

Describe the solution you'd like

He shows the best way to do it is like this:

I think it would be fine to add a command line argument to the watchtower binary that (optionally, just checks if there is another watchtower process running and then) returns 0.

Then we could add that as the HEALTHCHECK in the docker file.

This way, we still fulfill the contract of "when is the container considered healthy", despite the actual work the HEALTHCHECK command does being none.

The reasoning stated above as to why we only do that should of course be added to the docs

Describe alternatives you've considered

There is no alternative.

Additional context

No response

[github-actions]

Hi there! 👋🏼 As you're new to this repo, we'd like to suggest that you read our code of conduct as well as our contribution guidelines. Thanks a bunch for opening your first issue! 🙏

[denisz1]

I close this because the other one is now reopen.