Update alpine Docker tag to v3.20 #146

	name: core
	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master
	workflow_dispatch:

	jobs:
	build-core:
	runs-on: ubuntu-latest
	container:
	image: docker:24.0.7
	env:
	DOCKER_DRIVER: overlay2
	DOCKER_TLS_CERTDIR: ""
	CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
	CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
	steps:
	- name: Build core automation
	run: \|
	apk add git make

	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Login to the GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build and push image
	uses: docker/build-push-action@v5
	with:
	push: true
	context: .
	file: ./Dockerfile
	tags: \|
	ghcr.io/netbootxyz/${{ github.workflow }}:latest
	ghcr.io/netbootxyz/${{ github.workflow }}:${{ github.sha }}

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