Update README.md #56

	name: Publish Docker image
	on:
	push:
	branches: [ master ]
	pull_request:

	jobs:
	docker:
	name: Build Docker Image and Publish (only on push)
	runs-on: ubuntu-latest
	steps:

	- name: Check out the repo
	uses: actions/checkout@v2

	# Steps required by docker/build-push-action@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@v1
	if: github.event_name == 'push'
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}

	- name: Build (always) and Publish (only on push)
	uses: docker/build-push-action@v2
	with:
	tags: ucbbar/chisel-bootcamp:latest
	push: ${{ github.event_name == 'push' }}

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