add github workflow for CI #4

	name: CI
	on: [push]

	jobs:
	build:
	name: Test
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v1

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	- name: Cache Docker layers
	uses: actions/cache@v3
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.sha }}
	restore-keys: ${{ runner.os }}-buildx-

	- name: Run linter
	run: make lint

	- name: Run unit tests
	run: make test

	- name: Build
	run: make build

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