Post application url and commit hash as a PR comment after every deploy

[LucaLanziani]

Every new deploy should update the same comment.

Ideally something like the image below should work, as a start I would have:

sha: adsfasdf
timestamp: ___/___/___
url: asdflkjalsodfj

The Go code should output the data above and the PR comment should be create/update via a step in the github action.

The above assumes that there is already an action that can do the comment step, we are ok to use it if it is a trusted action otherwise we might have to reconsider this and either implement an action ourselves or implement the behaviour in go.