Copyed over GitHub Actions workflow from main

.github/workflows/gh-pages.yml

@@ -0,0 +1,52 @@
+name: public-build
+
+on:
+  push:
+    branches: [main, setup]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: 'main'
+          fetch-depth: 0
+
+      - uses: actions/checkout@v2
+        with:
+          ref: 'setup'
+          fetch-depth: 0
+          path: _setup
+
+      - name: Insert setup branch
+        run: cp -r _setup/* .
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '16'
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        id: npm-cache
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build public view
+        run: npm run build
+
+      - name: Deploy to GitHub Pages
+        uses: crazy-max/ghaction-github-pages@v2
+        with:
+          target_branch: gh-pages
+          build_dir: dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}