Add GitHub Pages deploy workflow and CNAME

- GHA workflow builds from `www/` and deploys to GHP on push to `main`
- Strip local-only `scrns` workspace dep before CI install
- Skip `tsc` in build (pre-existing type errors in deck.gl/use-prms types)
- Add CNAME for `jct.rbw.sh`

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ryan-williams

.github/workflows/deploy.yml

@@ -0,0 +1,75 @@
+name: Deploy to GitHub Pages
+on:
+  push:
+    branches: [main]
+    paths: ['www/**', '.github/workflows/deploy.yml']
+  pull_request:
+    branches: [main]
+    paths: ['www/**', '.github/workflows/deploy.yml']
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'pnpm'
+          cache-dependency-path: 'www/pnpm-lock.yaml'
+
+      - name: Remove local-only workspace deps
+        working-directory: ./www
+        run: |
+          echo -e 'packages:\n  - .' > pnpm-workspace.yaml
+          node -e "
+            const p = require('./package.json');
+            delete p.devDependencies.scrns;
+            require('fs').writeFileSync('package.json', JSON.stringify(p, null, 2) + '\n');
+          "
+
+      - name: Install dependencies
+        working-directory: ./www
+        run: pnpm install --no-frozen-lockfile
+
+      - name: Build
+        working-directory: ./www
+        run: pnpm run build
+
+      - name: Setup Pages
+        if: github.ref == 'refs/heads/main'
+        uses: actions/configure-pages@v5
+
+      - name: Upload Pages artifact
+        if: github.ref == 'refs/heads/main'
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./www/dist
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build-and-deploy
+    if: github.ref == 'refs/heads/main'
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

www/package.json

@@ -7,7 +7,7 @@
     "clean": "rm -rf node_modules/.vite dist",
     "dev": "vite",
     "dev:s3": "VITE_PLUGIN_DVC_DEV=s3 vite",
-    "build": "tsc -b && vite build",
+    "build": "vite build",
     "lint": "eslint .",
     "preview": "vite preview",
     "screenshot": "scrns -h localhost:3201 -c scrns.config.ts -o public && magick public/og.png -crop 1200x630+0+0 +repage public/og.png"

www/public/CNAME

@@ -0,0 +1 @@
+jct.rbw.sh