Add Version Tag to Footer

[reglim]

It would be useful for auto-deployed systems if the current release / the current docker hash would be displayed in the footer or somewhere else so one can easily verify whether a new version has been published already.

[larrycai]

for end user, important thing is to know

• what docat version is used now (show in portal/help page)
• each release has a version which matches docker image tag, hash is good, but not so easy to check for end-user

[reglim]

I think just using the docker image tag should theoretically work, since you're usually running docat with a version like 0.3.0, and if not, the hash would be fine, since you're probably running it for test purposes.

[fliiiix]

We could/should show it at least on the /#/help page

[reglim]

Currently implemented as follows:

There is a tag on our current commit, we use that:

If not, we use the commit hash which should be easy for devs to verify :

[reglim]

That didn't work on the github pipeline (where it seems like the commit hash is used as a tag), so I just resorted to using the tag if present and the short hash if not.