Update GitHub Actions to support GitHub Container Registry

[webysther]

Closes #319

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[lovasoa]

hmm, I'm not sure, but I don't think this is how it is supposed to work?

You are never supposed to create GitHub tokens for gh actions, they should use their own temporary token, which is more secure. Shouldn't they?

[webysther]

hmm, I'm not sure, but I don't think this is how it is supposed to work?

You are never supposed to create GitHub tokens for gh actions, they should use their own temporary token, which is more secure. Shouldn't they?

Yeap, I forgot, the GITHUB_TOKEN you don't need to create.