refactor: use MEMORY type cache #92

	name: Run tests

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:

	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1
	- name: Cache register
	uses: actions/cache@v2
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ hashFiles('**/Dockerfile') }}
	- name: Build Docker image
	uses: docker/build-push-action@v2
	with:
	context: ./
	file: ./scripts/setup_and_run_rebar3_ct_in_docker/Dockerfile.ubuntu22.04
	builder: ${{ steps.buildx.outputs.name }}
	load: true
	tags: sasl_auth_dockerfile.ubuntu22.04
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache-new
	# This ugly bit is necessary if you don't want your cache to grow forever
	# till it hits GitHub's limit of 5GB.
	# 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
	- name: Run tests
	run: (cd ${GITHUB_WORKSPACE} && ./scripts/setup_and_run_rebar3_ct_in_docker/run_in_docker.sh)

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