ci: inject Firebase config from GitHub Secrets

.github/workflows/deploy.yml

@@ -28,8 +28,21 @@ jobs:
           node-version: 22
           cache: npm
 
-      - name: Copy firebase config
-        run: cp src/environments/firebaseConfig.example.ts src/environments/firebaseConfig.ts
+      - name: Create firebase config from secrets
+        run: |
+          cat > src/environments/firebaseConfig.ts <<EOF
+          export const firebaseConfig = {
+            apiKey: '${{ secrets.FIREBASE_API_KEY }}',
+            authDomain: '${{ secrets.FIREBASE_AUTH_DOMAIN }}',
+            databaseURL: '${{ secrets.FIREBASE_DATABASE_URL }}',
+            projectId: '${{ secrets.FIREBASE_PROJECT_ID }}',
+            storageBucket: '${{ secrets.FIREBASE_STORAGE_BUCKET }}',
+            messagingSenderId: '${{ secrets.FIREBASE_MESSAGING_SENDER_ID }}',
+            appId: '${{ secrets.FIREBASE_APP_ID }}'
+          };
+
+          export const recaptchaSiteKey = '${{ secrets.RECAPTCHA_SITE_KEY }}';
+          EOF
 
       - run: npm ci