chore: build image for multiple CPU architectures linux/amd64,linux/arm64

[lukasholzer]

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Summary

Fixes #822 Fixes #821

• Creates an image for each CPU architecture (amd64, arm64) and pushes it to the registry
• Combines those images to a multiarch image (one image that is available for multiple architectures)
• Forked PR pipeline works the same (except with the hold step in between)
• Fixed the tag pipeline and build a squash image for a given tag
• Updated the Makefile to contain all the needed commands to run locally on M1 macs as well.
• Enhanced documentation about how to run things

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[lukasholzer]

Currently blocked by https://github.com/netlify/binrc/issues/36

[lukasholzer]

Forked PR's

the onhold works fine

The image on hub.docker.com

[lukasholzer]

The overall pipeline time went down from 20min to 14min by removing the need of saving and attaching the images and doing the testing and building in one stage

[lukasholzer]

working for tags as well:

https://hub.docker.com/layers/build/netlify/build/v4.10.1-test.7-squash/images/sha256-abfb143ef652cd3bfd6aef99dca7607bd83bab02352e83268d0e0a8ab52ca2d1?context=explore

[lukasholzer]

@kitop can you try running make build-base on your local mac? I guess you have a intel one or?

[kitop]

@kitop can you try running make build-base on your local mac? I guess you have a intel one or?

@lukasholzer it seemed to work, took 815.1s. Do you want me to run anything else in particular? tests? a script?

[lukasholzer]

@kitop can you try running make build-base on your local mac? I guess you have a intel one or?

@lukasholzer it seemed to work, took 815.1s. Do you want me to run anything else in particular? tests? a script?

nope just wanted to check if the local commands are working with make (gathering the correct archname on amd machines) Tests and everything are working on the CI so should be more than good to go