feat: grey out undo button when there is no more undo #19

	name: Build Container Image

	# Controls when the workflow will run
	on:
	workflow_dispatch:
	push:
	branches: [master]
	tags: [v*]
	release:
	types: [published]

	permissions:
	contents: read
	packages: write

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	# Get the repository's code
	- name: Checkout
	uses: actions/checkout@v4

	# Generate docker tags
	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ghcr.io/tn1ck/super-sudoku

	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@v3

	- name: Login to GHCR
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	context: .
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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