docs: fix oci-image example, add test + docs #84

	name: Release

	on:
	push:
	# Publish `master` as Docker `latest` image.
	branches:
	- master

	# Publish `v1.2.3` tags as releases.
	tags:
	- v*

	jobs:
	push:
	runs-on: ubuntu-latest
	if: github.event_name == 'push'

	steps:
	- name: Set up Go
	uses: actions/setup-go@v1
	with:
	go-version: 1.19

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- name: Set up qemu
	uses: docker/setup-qemu-action@v1
	with:
	platforms: all

	- name: Extract Helm version
	id: extract_helm_version
	run: \|
	printf '::set-output name=helm_version::' &&
	grep helm\.sh/helm/ go.mod \| sed -E -e 's!helm\.sh/helm/v3\|\s+\|\+.*!!g; s!^v!!' \| cut -d " " -f2 \| grep -E .+

	- name: Build & Test
	run: make test check image e2e-test

	- name: Log into GitHub registry
	run: echo "${{ secrets.GITHUB_TOKEN }}" \| docker login ghcr.io -u ${{ github.actor }} --password-stdin

	- name: Log into DockerHub registry
	run: echo "${{ secrets.DOCKERHUB_TOKEN }}" \| docker login docker.io -u "${{ secrets.DOCKERHUB_USERNAME }}" --password-stdin

	- name: Run GoReleaser
	uses: goreleaser/goreleaser-action@v2
	if: startsWith(github.ref, 'refs/tags/')
	with:
	version: v1.9.2
	args: release --rm-dist
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	HELM_VERSION: ${{ steps.extract_helm_version.outputs.helm_version }}

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