add pages workflow on main

.github/workflows/pages.yml

@@ -0,0 +1,58 @@
+# workflow for building and deploying a smart-contracts docs site to GitHub Pages
+name: Deploy on-chain generator viewer with GitHub Pages dependencies preinstalled
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]
+
+  # Allows you to run 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:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ">=20.11.1"
+          cache: "npm"
+      - name: install dependencies
+        run: |
+          npm install
+      - name: Set up dummy env vars
+        run: |
+          echo "VITE_NETWORK=sepolia" >> $GITHUB_ENV
+      - name: build site
+        run: npm run build
+      - name: upload docs artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: ./dist
+
+  # Deployment job
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1