Merge tag 'v1.49.2' into AMP.chat #1

	# GitHub actions workflow which builds and publishes the docker images.

	name: Build docker images

	on:
	push:
	tags: ["v*"]
	branches: [ master, main, develop ]
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Set up QEMU
	id: qemu
	uses: docker/setup-qemu-action@v1
	with:
	platforms: arm64

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

	- name: Inspect builder
	run: docker buildx inspect

	- name: Log in to DockerHub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Calculate docker image tag
	id: set-tag
	run: \|
	case "${GITHUB_REF}" in
	refs/heads/develop)
	tag=develop
	;;
	refs/heads/master\|refs/heads/main)
	tag=latest
	;;
	refs/tags/*)
	tag=${GITHUB_REF#refs/tags/}
	;;
	*)
	tag=${GITHUB_SHA}
	;;
	esac
	echo "::set-output name=tag::$tag"

	# for release builds, we want to get the amd64 image out asap, so first
	# we do an amd64-only build, before following up with a multiarch build.
	- name: Build and push amd64
	uses: docker/build-push-action@v2
	if: "${{ startsWith(github.ref, 'refs/tags/v') }}"
	with:
	push: true
	labels: "gitsha1=${{ github.sha }}"
	tags: "matrixdotorg/synapse:${{ steps.set-tag.outputs.tag }}"
	file: "docker/Dockerfile"
	platforms: linux/amd64

	- name: Build and push all platforms
	uses: docker/build-push-action@v2
	with:
	push: true
	labels: "gitsha1=${{ github.sha }}"
	tags: "matrixdotorg/synapse:${{ steps.set-tag.outputs.tag }}"
	file: "docker/Dockerfile"
	platforms: linux/amd64,linux/arm64

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