ci(site): add preview deployments

.github/workflows/site-preview.yml

@@ -0,0 +1,53 @@
+name: Site Preview
+
+on:
+  pull_request
+
+env:
+    ARTIFACT_NAME: BUILD_LOG
+    NIX_VERSION: nix-2.14.1
+    NIXPKGS_CHANNEL: nixos-22.11
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  preview:
+    runs-on: beefy-runner
+    outputs:
+      preview-url: ${{ steps.publish-preview.outputs.preview-url }}
+    permissions: write-all
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          lfs: true
+      - uses: cachix/install-nix-action@v20
+        with:
+          nix_path: nixpkgs=channel:${{ env.NIXPKGS_CHANNEL }}
+          github_access_token: ${{ github.token }}
+          extra_nix_config: |
+            trusted-public-keys = union.cachix.org-1:TV9o8jexzNVbM1VNBOq9fu8NK+hL6ZhOyOh0quATy+M= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
+            substituters = https://union.cachix.org/ https://cache.nixos.org/
+      - run: |
+          nix-channel --add https://nixos.org/channels/${{ env.NIXPKGS_CHANNEL }} nixpkgs
+          nix-channel --update
+          nix-env -iA nixpkgs.nodePackages.vercel
+      - name: "Publish Preview to Vercel"
+        id: publish-preview
+        run: |
+            cd site
+            vercel pull --yes --environment=preview --token=${{secrets.VERCEL_TOKEN}} --scope unionbuild
+            vercel build --token=${{secrets.VERCEL_TOKEN}} --scope unionbuild
+            PREVIEW_URL=$(vercel deploy --prebuilt --token=${{secrets.VERCEL_TOKEN}} --scope unionbuild)
+            echo "preview-url=${PREVIEW_URL}" >> "$GITHUB_OUTPUT"
+      - name: Create Preview Comment
+        if: github.event_name == 'pull_request'
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          mode: upsert
+          message: |
+            # Site Preview URL
+            ${{ steps.publish-preview.outputs.preview-url }}
+          comment_tag: Site Preview URL
+          GITHUB_TOKEN: ${{ github.token }}

site/vercel.json

@@ -0,0 +1,4 @@
+{
+  "outputDirectory": "result",
+  "buildCommand": "nix build .\#site-static"
+}