GHCR Docker image build and publish workflow

[bdovaz]

Example of creating a docker image and running it

[bdovaz]

@sopov can you merge this? Thanks.

[semihkeskindev]

It worked, thanks 🙏

[bdovaz]

@sopov ping!

[sravan1000]

Why docker is needed for this? if you have go installed we are good to go right?

[bdovaz]

@sravan1000 in my case and that of many others: not having (or wanting to have) the environment to be able to compile code in go or not having knowledge about go (my case).

With a Docker image all this is simplified and you simply have to run it in a container passing it the appropriate parameters.

Also, this PR creates an example only, it is not my intention to upload it to docker hub (although it could be done).

[bdovaz]

I just added the workflow that creates the image automatically in ghcr and the new instructions to get the value of SecureID following https://github.com/sopov/resumeio2pdf/issues/27#issuecomment-2016434712

[bdovaz]

@sopov merge, please!