update default snippet #60

	name: docker build and publish
	on:
	push:
	branches:
	- main
	jobs:
	build-and-publish:
	name: build and publish
	runs-on: ubuntu-latest
	steps:
	- name: Get Short SHA
	id: sha
	run: echo "::set-output name=sha7::$(echo ${GITHUB_SHA} \| cut -c1-7)"

	- name: Checkout Code
	uses: actions/checkout@v2

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

	- name: Build and push
	uses: docker/build-push-action@v2
	with:
	push: true
	tags: ${{ github.repository }}:${{ steps.sha.outputs.sha7 }}

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