refactor(.goreleaser.yml): change dockerfile name from goreleaser.doc…

[GImbrailo]

…kerfile to Dockerfile for standardization and better readability

[denisandreenko]

Dockerfile building an image only for amd64 architecture (for local development, testing on VMs)
For releasing purpose with different architectures - there is goreleaser.dockerfile file.
So there is no need to change this file.

[GImbrailo]

Dockerfile building an image only for amd64 architecture (for local development, testing on VMs) For releasing purpose with different architectures - there is goreleaser.dockerfile file. So there is no need to change this file.

Thanks, @denisandreenko. this PR should have been a draft as I was just starting out. I was hoping we could use the same Dockerfile for our release. If you don't think it is clear cut, I will close this PR.