Add GitHub Actions workflow for deployment to GitHub Pages (#3)

Author: rdhar

.github/workflows/deploy.yml

@@ -0,0 +1,67 @@
+---
+name: Deploy
+
+on:
+  merge_group:
+    types: [checks_requested]
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  Build:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+
+      - name: Cache dependencies
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
+        with:
+          path: ~/.bun/install/cache
+          key: bun-${{ runner.os }}-${{ hashFiles('bun.lock') }}
+          restore-keys: bun-${{ runner.os }}-
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Build project
+        run: bun run build
+
+      - name: Upload to GitHub Pages
+        if: github.event_name != 'merge_group'
+        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
+        with:
+          path: dist
+          retention-days: 1
+
+  Deploy:
+    if: github.event_name != 'merge_group'
+    needs: Build
+    runs-on: ubuntu-24.04
+
+    permissions:
+      id-token: write
+      pages: write
+
+    concurrency:
+      cancel-in-progress: true
+      group: github-pages
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0