Update README and fix issue in one-to-many matches #120

	name: Build private-id Docker Image

	on:
	pull_request:
	branches: [ main ]
	env:
	DISTRO: ubuntu
	REGISTRY: ghcr.io
	LOCAL_IMAGE_NAME: private-id
	LOCAL_IMAGE_TAG: latest
	REGISTRY_IMAGE_NAME: ghcr.io/${{ github.repository }}

	jobs:
	push:
	runs-on: ubuntu-latest
	name: Build image
	permissions:
	contents: read
	packages: write

	steps:
	- name: Lowercase REGISTRY_IMAGE_NAME
	id: string
	uses: ASzc/change-string-case-action@v1
	with:
	string: ${{ env.REGISTRY_IMAGE_NAME }}

	- name: Load registry image name into env
	run: echo "REGISTRY_IMAGE_NAME_LOWERCASE=${{ steps.string.outputs.lowercase }}" >> ${GITHUB_ENV}

	- name: Check REGISTRY_IMAGE_NAME_LOWERCASE
	run: echo "env.$REGISTRY_IMAGE_NAME_LOWERCASE"

	- uses: actions/checkout@v2

	- name: Build image
	run: docker build -f ./Dockerfile -t ${{ env.LOCAL_IMAGE_NAME }}:${{ env.LOCAL_IMAGE_TAG }} .

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