docs: update readme.

readme.md

@@ -1,4 +1,69 @@
-dotnet formatter:
+# QuestFantasy Client (Frontend)
+
+This is the game client for **QuestFantasy**, built using **Godot Engine 3.6.2 Mono Edition** and C# (.NET).
+
+---
+
+## 🛠️ Prerequisites
+
+Before you compile and run the client, make sure your local system has:
+
+1.  **Godot Engine 3.6.2 Mono Edition**:
+    *   Download from the [Godot Engine Download Archive](https://godotengine.org/download/archive/3.6.2-stable/).
+    *   *Note: You MUST download the **Mono** version. The standard version does not support C# scripts.*
+2.  **.NET SDK 6.0**:
+    *   Download from the [.NET Official Website](https://dotnet.microsoft.com/en-us/download/dotnet/6.0).
+    *   Verify the installation by running:
+        ```bash
+        dotnet --version
+        ```
+
+---
+
+## 🚀 Build Instructions
+
+Restore the NuGet packages and compile the C# solution using the .NET CLI:
+
+```bash
+# Restore package dependencies
+dotnet restore
+
+# Build the QuestFantasy solution
+dotnet build QuestFantasy.sln
+```
+
+---
+
+## 🎨 Code Formatting
+
+To maintain a consistent coding style across the codebase, you can run the built-in dotnet formatter:
+
 ```bash
 dotnet format --verbosity diagnostic QuestFantasy.sln
-```
+```
+
+---
+
+## 🎮 Running the Game
+
+### Method 1: Using the Godot Editor (Recommended)
+1.  Open the **Godot 3.6.2 Mono** engine.
+2.  Click **Import** and select the [project.godot](file:///home/darrin/QuestFantasy/frontend/project.godot) file inside this directory.
+3.  Click the **Play** button (F5) in the top-right corner to compile and run the game.
+
+### Method 2: Command Line (CLI)
+Run the game client directly from the console by passing the path:
+```bash
+godot --path .
+```
+
+---
+
+## 🌐 Connecting to the Backend
+
+The frontend connects to the server API to handle authentication, data synchronization, and store transactions.
+*   **Default URL**: `http://127.0.0.1:8000` (matches the local Docker environment).
+*   **Custom Server Address**: If you host the backend on a different port or server, adjust the `BackendBaseUrl` parameter inside the Godot Editor inspector on these scripts:
+    *   [AuthApiClient.cs](file:///home/darrin/QuestFantasy/frontend/Scripts/Auth/AuthApiClient.cs)
+    *   [AuthFlowController.cs](file:///home/darrin/QuestFantasy/frontend/Scripts/Auth/AuthFlowController.cs)
+    *   [Main.cs](file:///home/darrin/QuestFantasy/frontend/Scripts/Main.cs)