Feature/arm

[dustinrue]

Description of the Change

This PR modifies the Dockerfile and build routines (actions) to:

• Build the image off of the updated upstream image 10up/wp-php-fpm-dev:7.4-ubuntu
• Provide a multi-stage build to reduce overall image size (using 10up/base-php:7.4-ubuntu)
• Updates the Github action to build for both amd64 and arm64 (adding native, full speed support for Apple's M series of processor including M1)

Alternate Designs

Benefits

Full native speed for Apple M1

Possible Drawbacks

Verification Process

I'm unable to fully test this

Checklist:

• [X] I have read the CONTRIBUTING document.
• [X] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my change.
• [ ] All new and existing tests passed.

Applicable Issues

Changelog Entry

• Update base image and create multi-arch image compatible with arm64 and Apple M series processors

[dustinrue]

To test this you would need to update the images value in wp-local-docker to ensure this image, where ever it lives, it used. I have a test version of this at https://hub.docker.com/repository/docker/dustinrue/wp-snapshots

[NicktheGeek]

I was able to test this and it solves a couple of important problems.

1. PHP 7.3 fails during export when encountering code in the site that is built for php 7.4+
2. M1 chips throw a non failing error but are subject to performance issues

This is the process I used to test.

1. Delete my local snapshot docker image
2. Clone the repo and checkout the branch
3. Modified the docker file with apt-get update && as noted in this comment https://github.com/10up/wpsnapshots/pull/92#discussion_r881725070
4. Built and tagged as 10up/wpsnaphots:latest so I could use that image with this command docker build -t 10up/wpsnapshots:latest . --build-arg WPSNAPSHOTS_ARCHIVE="https://github.com/10up/wpsnapshots/archive/refs/tags/2.2.1.tar.gz"
5. Ran snapshots on a site that was failing due to php 7.4 code

This worked for me and I think this should be merged and deployed once the apt-get update part is added so it will build successfully. Until then, I'll be writing instructions for my team to update their local image to a working version.

As a side note, might be a good idea to have multiple versions tagged for php version so that projects using php 8 and even php 8.1 can work correctly. This would require an update for 10up local docker so the php version of the project affects the version used to run snapshots.