docu: added spec and roadmap

README.md

@@ -25,6 +25,8 @@ The current focus is backend development, while frontend development has been se
 
 ActaTempus adheres to **Domain-Driven Design (DDD)** and **Clean Architecture** principles. The system is divided into **four primary layers**:
 
+![Architecture Diagram](docs/media/architecture.png)
+
 1️⃣ **Domain Layer**:  
    - Contracts, definitions, and core logic.  
 
@@ -39,6 +41,13 @@ ActaTempus adheres to **Domain-Driven Design (DDD)** and **Clean Architecture**
 
 ---
 
+## 📑 Specification
+
+The detailed system specification is available in the documentation. Refer to the specification document for an in-depth understanding of the system design, architecture, and implementation details.
+
+[📄 View the Specification](docs/KP_Spec-4.pdf)
+---
+
 ## 🛠️ Technology Stack
 
 ### ⚙️ Backend
@@ -202,6 +211,31 @@ The Insomnia collection is provided under `docs/insomnia`. Import it to get star
 
 ---
 
+## 🛣️ Roadmap
+
+### Phase 1: **Initialize**
+- ✅ Define specifications  
+- ✅ Set up repository  
+
+### Phase 2: **Setup**
+- ✅ Frontend (Next.js, Deno)  
+- ✅ Backends (Dart & Go)  
+- ✅ Devcontainer  
+
+### Phase 3: **MVP Development**
+- Build foundational backends in Go & Dart
+- Implement:  
+  - ✅ Domain layer (Entities, Repositories)  
+  - ✅ Application logic (Services, DTOs, JWT Authentication)  
+  - ✅ Basic authorization  
+
+### Phase 4: **Web UI**
+- 🎨 Build frontend for:  
+  - Timetracking  
+  - Project management  
+  - Reporting  
+
+---
 
 ## 🌐 Resources