Fix container publishing workflow #3

	name: Docker Image Build & Push to ghrc.io

	on:
	push:
	branches: [ "main" ]
	tags: [ "v..*" ]
	pull_request:
	branches: [ "main" ]
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout the codebase
	uses: actions/checkout@v3

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Extract tag name
	id: get_tag
	run: echo ::set-output name=TAG_NAME::${GITHUB_REF#refs/tags/}
	- name: Use tag name
	run: echo ${{ steps.get_tag.outputs.TAG_NAME }}
	- name: Build the Docker image
	run: \|
	export REG_NS=ghcr.io/vlizbe/
	TAG_NAME=${GITHUB_REF#refs/tags/}
	# build tag is the same as tag name for releases if this matches the semver format else it is latest
	# The string you want to check
	# The regular expression
	regex="^(0\|[1-9][0-9])\\.(0\|[1-9][0-9])\\.(0\|[1-9][0-9])(-((0\|[1-9][0-9]\|[0-9][a-zA-Z-][0-9a-zA-Z-])(\\.(0\|[1-9][0-9]\|[0-9][a-zA-Z-][0-9a-zA-Z-]))))?(\\+([0-9a-zA-Z-]+(\\.[0-9a-zA-Z-]+)*))?$"
	if [[ $TAG_NAME =~ $regex ]]; then
	export BUILD_TAG=$TAG_NAME
	else
	export BUILD_TAG="latest"
	fi
	echo $BUILD_TAG
	REPOSITORY_NAME=$(echo $GITHUB_REPOSITORY \| tr '[:upper:]' '[:lower:]')
	echo $REG_NS$REPOSITORY_NAME:$BUILD_TAG

	docker build -t $REG_NS$REPOSITORY_NAME:$BUILD_TAG .
	docker push $REG_NS$REPOSITORY_NAME:$BUILD_TAG

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