Upgrade docker setup: - Githubissues

Description

Update docker to php:8.1.0 Install composer and dependencies in the docker image Remove "vendor/bin/phpunit" command from the image to allow installing composer dependencies from fresh Add composer install example command Update docker-compose commands to use "-u $(id -u ${USER}):$(id -g ${USER})" to have files generated in docker have the proper permission on the host machine Clean php80 commands Add volume (commented by default) to take advantage of local composer cache

Motivation and context

Why is this change required? What problem does it solve?

fixes#1

If it fixes an open issue, please link to the issue here (if you write fixes #num or closes #num, the issue will be automatically closed when the pull is accepted.)

How has this been tested?

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Screenshots (if appropriate)

Types of changes

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[ ] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

Go over all the following points, and put an x in all the boxes that apply.

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[ x] I have created a branch for this patch/feature.
[ x] Each individual commit in the pull request is meaningful.
[ ] I have added tests to cover my changes. - this is not applicable as i did not touch code
[x ] If my change requires a change to the documentation, I have updated it accordingly.

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Crell / Serde