Add github action workflow for docker build #49

	name: Build and Test

	on:
	push:
	branches:
	- 'main'
	pull_request:
	branches:
	- '*'

	jobs:
	build:
	strategy:
	matrix:
	os: [ubuntu-latest, macOS-latest, windows-latest]
	runs-on: ${{ matrix.os }}
	name: Build & Test
	steps:
	-
	name: Checkout
	uses: actions/checkout@v2
	-
	name: Setup go
	uses: actions/setup-go@v2
	with:
	go-version: '^1.16.0'
	-
	name: Download dependencies
	run: go mod download
	-
	name: Build & Test
	run: \|
	go build -o ./cert-checker -v ./cmd/
	go test ./...
	-
	name: Run GoReleaser
	uses: goreleaser/goreleaser-action@v2
	with:
	args: release --snapshot --skip-publish --rm-dist
	workdir: ./cmd/

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