feat: added healthcheck to outline

[SilasPeters]

This PR aims to monitor the downage of Outline, by adding healthchecks to a custom image of outline.

In order to properly achieve this, the compose-up.yml tasks of the Docker role needed to be expanded to support rebuilding (outdated) images.

Closes #466

[SilasPeters]

Can't convert this to draft on mobile so here goes: outline recently fixed itself so the Docker file is redundant. Will simplify things

[SilasPeters]

@stickyPiston pretty please? 🦫

[SamStaijen]

LGTM, did not test tho.

Edit: I see this is a draft. I have reverted my approval, please ping mw when done.

[SilasPeters]

LGTM, did not test tho.

Edit: I see this is a draft. I have reverted my approval, please ping mw when done.

I just finished it now, but I am not certain that my change will not affect the data stored. I will check on staging.

[SilasPeters]

After you reviewed I reverted the changes to the line where it states to what path the storage-data named volume was mounted in the container. If I did not do so, all data would probably not be found on production and the board would lose temporarily lose access to the files. I guess you missed that in the review, but now it's done!