Add screenshots to README #6

	name: Build Docker image

	on:
	push:
	branches:
	- 'master'

	jobs:
	docker:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1
	- name: Login to DockerHub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	- name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: .
	push: true
	tags: \|
	mpoc/ranker:${{ github.sha }}
	mpoc/ranker:latest

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