firebase prod setup and flavors enhancement.

lib/firebase_options.dart

@@ -0,0 +1,41 @@
+// File generated by FlutterFire CLI.
+// ignore_for_file: type=lint
+import 'package:firebase_core/firebase_core.dart' show FirebaseOptions;
+import 'package:flutter/foundation.dart' show kIsWeb;
+import 'package:syncrow_app/firebase_options_dev.dart' as dev;
+import 'package:syncrow_app/firebase_options_prod.dart' as prod;
+import 'package:syncrow_app/firebase_options_staging.dart' as staging;
+
+/// Default [FirebaseOptions] for use with your Firebase apps.
+///
+/// Example:
+/// ```dart
+/// import 'firebase_options.dart';
+/// // ...
+/// await Firebase.initializeApp(
+///   options: DefaultFirebaseOptions.currentPlatform,
+/// );
+/// ```
+class DefaultFirebaseOptions {
+  static FirebaseOptions get currentPlatform {
+    const flavor = String.fromEnvironment('flavor');
+    if (kIsWeb) {
+      throw UnsupportedError(
+        'DefaultFirebaseOptions have not been configured for web - '
+        'you can reconfigure this by running the FlutterFire CLI again.',
+      );
+    }
+    switch (flavor) {
+      case 'dev':
+        return dev.DefaultFirebaseOptions.currentPlatform;
+      case 'staging':
+        return staging.DefaultFirebaseOptions.currentPlatform;
+      case 'prod':
+        return prod.DefaultFirebaseOptions.currentPlatform;
+      default:
+        throw UnsupportedError(
+          'DefaultFirebaseOptions are not supported for this flavor.',
+        );
+    }
+  }
+}