chore: add hadolint (#58) #49

	name: Build and Push Docker Image

	on:
	push:
	branches:
	- main
	release:
	types:
	- created

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v1

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Determine Git tag
	id: git-tag
	run: echo "::set-output name=tag::$(git describe --exact-match --tags HEAD \|\| echo '')"

	- name: Set tag if empty or invalid
	id: set-tag
	run: \|
	if [ -z "${{ steps.git-tag.outputs.tag }}" ]; then
	echo "::set-output name=tag::latest"
	elif [[ "${{ steps.git-tag.outputs.tag }}" == " " ]]; then
	echo "::set-output name=tag::latest"
	else
	echo "::set-output name=tag::${{ steps.git-tag.outputs.tag }}"
	fi

	- name: Login to Docker Hub
	uses: docker/login-action@v3
	with:
	username: ${{ env.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Set default value for env.PUSH_DOCKER_IMAGE if not defined
	run: \|
	if [[ -z "${{ env.PUSH_DOCKER_IMAGE }}" ]]; then
	echo "Variable 'PUSH_DOCKER_IMAGE' is not defined. Setting default value."
	export PUSH_DOCKER_IMAGE=false
	fi

	- name: Build and push Docker image
	uses: docker/build-push-action@v2
	with:
	context: ./bot/
	file: ./bot/Dockerfile
	# platforms: linux/amd64
	platforms: linux/amd64,linux/arm/v7,linux/arm64/v8,linux/386
	push: true
	tags: \|
	${{ env.DOCKERHUB_USERNAME }}/url-fairy-bot:latest
	${{ env.DOCKERHUB_USERNAME }}/url-fairy-bot:${{ github.sha }}
	${{ env.DOCKERHUB_USERNAME }}/url-fairy-bot:${{ steps.set-tag.outputs.tag }}

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