docs: add Docker build failure investigation task and pause audio investigation.

pubspec.yaml

@@ -47,12 +47,7 @@ dependencies:
   equatable: ^2.0.5
   shared_preferences: ^2.3.2
   
-  # Server dependencies (for backend proxy)
-  shelf: ^1.4.1
-  shelf_static: ^1.1.2
-  shelf_router: ^1.1.4
-  sqlite3: ^2.1.0
-  args: ^2.5.0
+
 
 dev_dependencies:
   flutter_test: