fix(per-commit) add a nightly label

[gszr]

Historically, kong-build-tools would update the latest tag
for each new per-commit release. Since acfda16, that is no longer the
case.

Given it's useful to have a generic name for the latest build of
kong - and we want to avoid pushing a tag named latest, so as to avoid
surprises when users pull kong/kong- this commit adds a nightly tag.
Such tag will be used, for example, in decK's CI, where we want to test
against the latest available build of Kong.

Following this PR, the latest tag should also be removed from kong/kong
(it is still pointing to an old per-commit release).

(I am open to suggestions for a better name, since nightly doesn't really
represent the periodicity of the build -- it's generated per commit pushed to
Kong's master branch.)

[gszr]

Perhaps kong/kong:master instead of kong/kong:nightly?

[GGabriele]

+1 to kong/kong:master for me. That's more descriptive and gives a better idea of "what" and "where", instead of a misleading "when" for nightly.

[gszr]

+1 to kong/kong:master for me. That's more descriptive and gives a better idea of "what" and "where", instead of a misleading "when" for nightly.

👍 just pushed the change!

[aboudreault]

looks similar to Kong/kong#9014?

[hutchic]

adding onto @aboudreault looks similar to https://github.com/Kong/kong-ee/pull/3432 😂

[GGabriele]

So much parallel effort lol

So, what is the current status? As per the commit referenced by @aboudreault , does now latest matches the current master branch?

[gszr]

@hutchic Any updates on this? Should we merge or close this out? I see the EE PR got merged, but that should not affect this one.

[hutchic]

I think we no longer need this with https://github.com/Kong/kong-ee/pull/3650 and Kong/kong#9168

[gszr]

Closing this. Thanks all!