Update env var naming, default values, and doc: #16

	name: Publish Release
	on:
	push:
	tags:
	- '*'

	env:
	# Use docker.io for Docker Hub if empty
	REGISTRY: ghcr.io

	jobs:
	goreleaser:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v6
	with:
	fetch-depth: 0
	- name: Set up Go
	uses: actions/setup-go@v6
	with:
	go-version: 1.25
	- name: Login to ghcr.io
	if: github.event_name != 'pull_request'
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Run GoReleaser
	uses: goreleaser/goreleaser-action@v7
	with:
	version: latest
	args: release --clean
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Provide feedback