Add GitHub pages deploy action

Author: myme

.github/workflows/build-pages.yml

@@ -0,0 +1,49 @@
+name: "Build GitHub Pages"
+
+on:
+  push:
+    branches: [ "master" ]
+
+  # Allows running this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2.4.0
+    - uses: cachix/install-nix-action@v16
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v10
+      with:
+        name: myme
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - name: Build Static Site
+      run: |
+        nix build .#site
+        cp --recursive --dereference --no-preserve=mode,ownership result public
+    - name: Setup Pages
+      uses: actions/configure-pages@v2
+    - name: Upload artifact
+      uses: actions/upload-pages-artifact@v1
+      with:
+        # Upload entire repository
+        path: './public'
+    - name: Deploy to GitHub Pages
+      id: deployment
+      uses: actions/deploy-pages@v1