Add Firebase configuration and deployment setup

.firebaserc

@@ -0,0 +1,5 @@
+{
+  "projects": {
+    "default": "castingthreejs"
+  }
+}

.github/workflows/firebase-hosting.yml

@@ -0,0 +1,35 @@
+name: Deploy to Firebase Hosting
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build_and_deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Deploy to Firebase Hosting
+        uses: FirebaseExtended/action-hosting-deploy@v0
+        with:
+          repoToken: ${{ secrets.GITHUB_TOKEN }}
+          firebaseServiceAccount: ${{ secrets.FIREBASE_SERVICE_ACCOUNT_CASTINGTHREEJS }}
+          projectId: castingthreejs
+          channelId: live

.gitignore

@@ -113,6 +113,10 @@ dist
 # Docusaurus cache and generated files
 .docusaurus
 
+# Firebase local state and logs
+.firebase/
+firebase-debug.log*
+
 # Serverless directories
 .serverless/
 

README.md

@@ -102,6 +102,22 @@ the looping idle, with `character.castBlendIn` / `castBlendOut` as the two edges
 The HDR is loaded as image-based lighting and as the reflection source for the ice — it is never
 shown as a visible sky. The stage keeps its flat dark backdrop.
 
+## Firebase Hosting
+
+This project deploys as a static Vite build, so Firebase Hosting serves the contents of `dist/`.
+
+1. Create a Firebase project in the Firebase Console.
+2. Replace `YOUR_FIREBASE_PROJECT_ID` in [.firebaserc](.firebaserc) and [.github/workflows/firebase-hosting.yml](.github/workflows/firebase-hosting.yml) with your real project id.
+3. In GitHub repository settings, add a secret named `FIREBASE_SERVICE_ACCOUNT_CASTINGTHREEJS` containing the Firebase service account JSON.
+4. Push to `main`. The workflow installs dependencies, runs `npm run build`, and deploys the build output to Firebase Hosting.
+
+For local verification, run:
+
+```bash
+npm run build
+firebase deploy --only hosting
+```
+
 ---
 
 ## Controls

firebase.json

@@ -0,0 +1,16 @@
+{
+  "hosting": {
+    "public": "dist",
+    "ignore": [
+      "firebase.json",
+      "**/.*",
+      "**/node_modules/**"
+    ],
+    "rewrites": [
+      {
+        "source": "**",
+        "destination": "/index.html"
+      }
+    ]
+  }
+}