Fix up unit tests and linter #51

	name: Docker image
	# Run the tasks on every push
	on: push
	jobs:
	build_push_api:
	name: Build and push execution environment
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repository
	uses: actions/checkout@v2

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Set up Docker layer caching
	uses: actions/cache@v2
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-buildx-
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Calculate metadata for image
	id: image-meta
	uses: docker/metadata-action@v3
	with:
	images: ghcr.io/stackhpc/os-capacity
	# Produce the branch name or tag and the SHA as tags
	tags: \|
	type=ref,event=branch
	type=ref,event=tag
	type=sha,prefix=
	- name: Build and push image
	uses: docker/build-push-action@v2
	with:
	context: .
	push: true
	tags: ${{ steps.image-meta.outputs.tags }}
	labels: ${{ steps.image-meta.outputs.labels }}
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max

	# Temp fix
	# https://github.com/docker/build-push-action/issues/252
	# https://github.com/moby/buildkit/issues/1896
	# https://github.com/docker/buildx/pull/535
	- name: Move cache
	run: \|
	rm -rf /tmp/.buildx-cache
	mv /tmp/.buildx-cache-new /tmp/.buildx-cache

Provide feedback