ci: added helm-test chart workflow (TRG 5.07)

[tom-rm-meyer-ISST]

Description

Adds the helm test workflow according to TRG 5.07. To clarify, if helm upgrade between charts is applicable to us.

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files

[tom-rm-meyer-ISST]

Hey @almadigabor, could you do a review and tell me why it fails due to kind version 1.27.3?

[tom-rm-meyer-ISST]

@tomaszbarwicki, linting progresses but the dockerfile can't be read in this run.

ERROR: failed to solve: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount2079917770/Dockerfile: no such file or directory
Error: buildx failed with: ERROR: failed to solve: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount2079917770/Dockerfile: no such file or directory

Do you got an idea why?

[almadigabor]

@tomaszbarwicki, linting progresses but the dockerfile can't be read in this run.

ERROR: failed to solve: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount2079917770/Dockerfile: no such file or directory
Error: buildx failed with: ERROR: failed to solve: failed to read dockerfile: open /var/lib/docker/tmp/buildkit-mount2079917770/Dockerfile: no such file or directory

Do you got an idea why?

Hey @tom-rm-meyer-ISST! The current issue happens because the action does not point to the Dockerfile's path using the context variable. You have your Dockerfiles in the frontend and backend directory. Based on your setup you should build both by duplicating the build step and create a frontend and backend image as well. Then in the end make sure to set the proper registry, app name and tag in the chart install step. You can find a good example here building frontend and backend images and then using them with the chart at the end.

[tom-rm-meyer-ISST]

Hey @almadigabor, needed some free space to have a look into it again. It now works. Thanks for your support. Could you please do the final review and accept it?

[almadigabor]

The workflow looks good now, although the actual chart-testing (install) step did not run as no chart changes were detected. Anyways I'll approve this PR.

[almadigabor]

Hey @tomaszbarwicki! Looks like you requested some changes that are outdated now. Can you re-review this PR?

[tomaszbarwicki]

LGTM