chore: fix docker build and cross build even on pr

[robertsLando]

No description provided.

[robertsLando]

@chrisns Seems that node:12.18.0-alpine is missing 386 arch

[linux/386 internal] load metadata for docker.io/library/node:12.18.0-al...
#8 ERROR: no match for platform in manifest sha256:53cd04d947b6c097fde5ea031622f917e8a61378890effd8d548b1204628a3fc: not found

When removing that everything works

We could revert back to erbium or I dunno what 😕 Based on node dockerhub i386 arch should be available for all tags

But based on this it is missing

But erbium-alpine has it

[robertsLando]

Now linux/386 fails in openzwave-shared build, seems something relative to the arch too. I suggest to remove linux/386

[robertsLando]

Errors are still in the format of libopenzwave that comes from your container 😕

[robertsLando]

@chrisns I think the problem is the same about yesterday: https://github.com/OpenZWave/openzwave-docker/blob/master/Dockerfile.alpine#L1

You are using an sha here