add dotenv to client

wien_talks/wien_talks_flutter/.gitignore

@@ -45,3 +45,5 @@ app.*.map.json
 /android/app/profile
 /android/app/release
 
+
+.env

wien_talks/wien_talks_flutter/pubspec.yaml

@@ -52,6 +52,9 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
   google_sign_in: ^7.1.1
+  flutter_staggered_grid_view: ^0.7.0
+  cached_network_image: ^3.4.1
+  flutter_dotenv: ^5.2.1
 
 dev_dependencies:
   flutter_lints: '>=3.0.0 <7.0.0'
@@ -71,6 +74,7 @@ flutter:
 
   # To add assets to your application, add an assets section, like this:
   assets:
+    - .env
     - assets/funny_images/
     - assets/render_themes/
     - packages/mapsforge_flutter/assets/patterns/dark_farmland.svg