Update docker/login-action action to v3 #78

	name: ci

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	-
	name: Checkout
	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: Login to DockerHub
	uses: docker/login-action@v3
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	-
	name: Cargo vendor
	run: cargo vendor
	-
	name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: .
	platforms: linux/arm64,linux/arm/v6
	push: ${{ github.ref == 'refs/heads/main' }}
	tags: texthtml/midi-synthesizer-autoconnect:latest
	cache-from: type=gha
	cache-to: type=gha,mode=max

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