Remove unused m gem. (#4088) #14

	name: Docker
	on:
	pull_request:
	push:
	branches:
	- master
	- oidc-api-tokens
	permissions:
	contents: read
	id-token: write

	jobs:
	build:
	name: Docker build (and optional push)
	runs-on: ubuntu-22.04
	env:
	RUBYGEMS_VERSION: 3.4.19
	RUBY_VERSION: 3.2.2
	steps:
	- uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # master
	- name: Cache Docker layers
	uses: actions/cache@704facf57e6136b1bc63b828d79edcd491f0ee84 # v3.3.2
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-rubygems-${{ hashFiles('**/Gemfile.lock') }}
	restore-keys: \|
	${{ runner.os }}-rubygems-org
	- name: Install and start services (needed for image test)
	run: docker-compose up -d
	- name: Configure AWS credentials from Production account
	uses: aws-actions/configure-aws-credentials@8c3f20df09ac63af7b3ae3d7c91f105f857d8497 # v4.0.0
	if: github.secret_source != 'None'
	with:
	role-to-assume: arn:aws:iam::048268392960:role/rubygems-ecr-pusher
	aws-region: us-west-2
	- name: Login to Amazon ECR
	if: github.secret_source != 'None'
	uses: aws-actions/amazon-ecr-login@2fc7aceee09e9e4a7105c0d060c656fad0b4f63d # v1.7.0
	- name: build, test and optionally push docker image
	run: ./script/build_docker.sh
	# Temp fix
	# https://github.com/docker/build-push-action/issues/252
	# https://github.com/moby/buildkit/issues/1896
	- name: Move cache
	run: \|
	rm -rf /tmp/.buildx-cache
	mv /tmp/.buildx-cache-new /tmp/.buildx-cache

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