Update dockerfile for newer .net #2

	name: Build and publish

	on:
	push:
	tags:
	- '*'

	jobs:
	push_to_registry:
	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.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}
	-
	name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: ./GlobalRankLookupCache
	file: ./GlobalRankLookupCache/Dockerfile
	platforms: linux/amd64
	push: true
	tags: pppy/osu-global-rank-lookup-cache:latest

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