Add Docker support and enhance data models for tender details

- Introduced a .dockerignore file to optimize Docker builds by excluding unnecessary files.
- Updated the Dockerfile to use a Flutter base image, enabling web builds for the application.
- Added new data models for `Lot` and `OrganizationAddress` to represent tender details more accurately.
- Enhanced the `Organization` model to include `companyId` and a nested `address` field.
- Updated the `TenderData` model to include new fields such as `noticeTypeCode`, `formType`, and `lots`, reflecting the API response structure.
- Regenerated necessary code for data models to ensure compatibility with the updated structures.

lib/data/services/model/organization/organization.g.dart

@@ -7,7 +7,20 @@ part of 'organization.dart';
 // **************************************************************************
 
 _Organization _$OrganizationFromJson(Map<String, dynamic> json) =>
-    _Organization(name: json['name'] as String?);
+    _Organization(
+      name: json['name'] as String?,
+      companyId: json['company_id'] as String?,
+      address:
+          json['address'] == null
+              ? null
+              : OrganizationAddress.fromJson(
+                json['address'] as Map<String, dynamic>,
+              ),
+    );
 
 Map<String, dynamic> _$OrganizationToJson(_Organization instance) =>
-    <String, dynamic>{'name': instance.name};
+    <String, dynamic>{
+      'name': instance.name,
+      'company_id': instance.companyId,
+      'address': instance.address,
+    };