Upgrade docker/build-push-action to v6 #70

	name: Node.js CI

	on:
	push:
	branches:
	- canary
	pull_request:
	branches:
	- dev

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	node-version:
	- 20.x
	- 22.x
	steps:
	- uses: actions/checkout@v4
	-
	name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}
	-
	name: Install dependencies
	run: npm ci
	-
	name: Build
	run: npm run build
	-
	name: Test
	run: npm test
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	-
	name: Build Docker image
	run: docker build .

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