Added env files and dotenv package

pubspec.yaml

@@ -48,6 +48,8 @@ dependencies:
   go_router:
   intl: ^0.19.0
   dropdown_search: ^5.0.6
+  flutter_dotenv: ^5.1.0
+
 
 dev_dependencies:
   flutter_test:
@@ -77,6 +79,9 @@ flutter:
     - assets/icons/
     - assets/images/
     - assets/
+    - .env.development
+    - .env.staging
+    - .env.production
 
 
   # An image asset can refer to one or more resolution-specific "variants", see