update #155

	name: build

	on:
	workflow_dispatch:
	push:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Get branch name
	id: branch-name
	uses: tj-actions/branch-names@v5.2
	- name: Install Kubernetes tools
	uses: yokawasa/action-setup-kube-tools@v0.8.0
	with:
	setup-tools: \|
	yq
	yq: "4.16.2"

	- name: Docker Build
	run: docker build . -t xctf

	- if: ${{ !(github.event_name == 'push' && github.ref == 'refs/heads/main') }}
	run: exit 0

	- name: Log into registry
	if: steps.branch-name.outputs.current_branch == 'main'
	run: echo "${{ secrets.GH_TOKEN }}" \| docker login ghcr.io -u ${{ github.actor }} --password-stdin

	- name: Push backend image
	if: steps.branch-name.outputs.current_branch == 'main'
	run: \|
	SERVER_IMAGE_ID=ghcr.io/xctf-io/xctf

	# Change all uppercase to lowercase
	SERVER_IMAGE_ID=$(echo $SERVER_IMAGE_ID \| tr '[A-Z]' '[a-z]')

	# Strip git ref prefix from version
	VERSION=$(echo "${{ github.ref }}" \| sed -e 's,./$.$,\1,')

	# Strip "v" prefix from tag name
	[[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION \| sed -e 's/^v//')

	# Use Docker `latest` tag convention
	[ "$VERSION" == "main" ] && VERSION=latest

	echo SERVER_IMAGE_ID=$SERVER_IMAGE_ID
	echo VERSION=$VERSION

	docker tag xctf $SERVER_IMAGE_ID:$VERSION
	docker push $SERVER_IMAGE_ID:$VERSION

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