add firebase hosting deployment

.github/workflows/deploy.yml

@@ -0,0 +1,22 @@
+---
+name: Deploy
+on:
+  push:
+    branches: main
+jobs:
+  deploy:
+    runs-on: ubuntu-22.04
+    container: node:20-alpine
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Install dependencies
+        run: npm i
+      - name: Build the site
+        run: npm run build
+      - name: Deploy to Firebase Hosting
+        uses: FirebaseExtended/action-hosting-deploy@v0
+        with:
+          firebaseServiceAccount: "${{ secrets.GOOGLE_SERVICE_ACCOUNT_KEY }}"
+          projectId: personal-419019
+          channelId: live

firebase.json

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+{
+  "hosting": {
+    "site": "calculator-me6msjmd",
+    "public": "dist",
+    "headers": [
+      {
+        "source": "**",
+        "headers": [
+          {
+            "key": "Content-Security-Policy",
+            "value": "default-src 'self';"
+          }
+        ]
+      }
+    ]
+  }
+}