Move over entirely to the new Actions YAML syntax

[chabad360]

This PR almost entirely removes the need for the env section in the workflow config (now it's only needed for PURGE_URLS) and transfers everything over to the with section (see the modified readme for details).

[jakejarvis]

Thanks @chabad360, this all looks good to me!

Unfortunately I'll need to hold off on merging because I had attempted to move the metadata from action.yml into Dockerfile in the past and it blocked me from publishing to the Action Marketplace.... Very, very weird but I sent a support ticket and have a thread on the forums (no response there yet) and I'll update you when I hear back from GitHub. Thanks again!!

[chabad360]

Yup, I discovered that the hard way too, turns out that as of last week the HCL (i.e. docker metadata) syntax is no longer supported (remember, Actions are after all only in beta). I had to migrate my Action as well (it was a pain, but now I feel almost like an expert in such migrations)...

But honestly, I really think the YAML format is better, it keeps things separate and cleaner...

[chabad360]

If you don't mind, I'll post a more detailed response on that forum post soon

[jakejarvis]

Sure thing! 👍

[chabad360]

So this can be merged then?

[chabad360]

any update on if this can be merged?

[RReverser]

@jakejarvis Sorry to be that guy, but "+1" couple of months since the last update is hopefully appropriate :)

I want to use this action, but env doesn't seem very natural in modern Actions.

Is there anything still preventing this PR from being merged?