feat: add Docker support, refactor DB layer, update API responses

bin/middleware/auth_middleware.dart

@@ -3,7 +3,7 @@ import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
 import 'package:dotenv/dotenv.dart';
 
 class AuthMiddleware {
-  final Handler handler;
+  final Future<Response> Function(Request, String) handler;
   
   AuthMiddleware(this.handler);
   
@@ -19,11 +19,15 @@ class AuthMiddleware {
     try {
       final dotenv = DotEnv();
       final secret = dotenv['JWT_SECRET'] ?? '';
-      final decoded = JWT.verify(token, SecretKey(secret));
+      final jwt = JWT.verify(token, SecretKey(secret));
+      final payload = jwt.payload;
+      final login = payload['login'] as String;
       
-      return handler(request);
-    } catch (e) {
-      return Response(401, body: 'Invalid or expired token');
+      return handler(request, login);
+    } on JWTExpiredException {
+      return Response(401, body: 'Token expired');
+    } on JWTException {
+      return Response(401, body: 'Invalid token');
     }
   }
 }