Sets up Action

[donatj]

So this sets up a basic GitHub action.

You can see it having ran and working here on the latest commit donatj/action-test#1

As written, it pulls the cs2pr file exclusively from the tag specified in the Dockerfile

annotate-pull-request-from-checkstyle-action/Dockerfile

Line 5 in f3b1d43

ADD https://raw.githubusercontent.com/staabm/annotate-pull-request-from-checkstyle/1.8.5/cs2pr /usr/local/bin

This could be changed to use composer, I played with that and this is a pinch faster. The ultimate judgment on that is on you of course.

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When this is merged into main, a Publish button should appear on the repo homepage. You'll use this to both tag and publish the first release.

You would create tags for your accepted commit as v1 v1.8 and v1.8.5

Future updates would replace the v1 tag and v1.8 if the new release was a 1.8.x release.

[donatj]

I've appended some directions onto the PR message above. Let me know if you have any questions.

[staabm]

thank you.

This could be changed to use composer, I played with that and this is a pinch faster.

if this means I don't need to manually update the dockerfile on every cs2pr release, then it would be a nice improvement.

it would be great I would not need to touch this repo often, as I have 0 experience with publishing an github action in this way :).

lets do it in a separate PR.