ci: switch to deploy to Netlify instead of Cloudflare pages (NixOS#772)

.github/workflows/build-and-deploy.yml

@@ -0,0 +1,44 @@
+name: "Build and Deploy"
+on:
+  push: {}
+  pull_request: {}
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - uses: cachix/install-nix-action@v23
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v12
+      with:
+        name: nix-dev
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+
+    - name: Build
+      run: |
+        nix-build
+
+        # The netlify action doesn't follow symlinks properly.
+        mkdir ./dist
+        cp -RL ./result/* ./dist/
+
+    - name: Deploy to Netlify
+      uses: nwtgck/actions-netlify@v2.0
+      env:
+        NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+        NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
+      with:
+        production-branch: 'master'
+        production-deploy: ${{ github.event_name == 'push' }}
+        publish-dir: './dist'
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        deploy-message: 'Deploy from GitHub Actions'
+        enable-pull-request-comment: true
+        overwrites-pull-request-comment: true
+        enable-commit-comment: false
+        enable-commit-status: true
+      #if: github.repository_owner == 'NixOS'