chore(ci) migrate our nightlies from master-nightly-alpine

[hutchic]

We now build docker containers that are simply named after the branch so kong/kong-gateway-internal:master

[Tieske]

Since alpine is not considered production ready, I was actually thinking of switching to another base image. If we remove the base image name, how will we be able to switch later?

[hutchic]

as of 3.x our alpine debian-slim and ubi-slim are all slimmed images. Whatever we make the default it will be a slim image that can be considered production and downstream projects should be safe to utilise that image

[Tieske]

That change doesn't seem to work: https://app.travis-ci.com/github/Kong/kong-pongo/jobs/576951914#L281

[Tieske]

The previous commit failed on the missing commit-id (in the labels); https://app.travis-ci.com/github/Kong/kong-pongo/jobs/576308638#L295

[hutchic]

Right sorry my bad -- master-alpine won't exist until after https://github.com/Kong/kong-ee/pull/3466 merges

[Tieske]

just verified, the failing test now works (cancelled the others because of duration, hence the reported failure still here)