Update README.md to enhance installation and testing instructions

README.md

@@ -1,16 +1,82 @@
-# README
+# EMLy
 
-## About
+EMLy is a lightweight, cross-platform EML (Email Message) viewer built with [Wails](https://wails.io/), Go, and Svelte. It allows users to open and view `.eml` files, including support for viewing attachments like images and PDFs.
 
-This is the official Wails Svelte template.
+## Requirements
+
+Before developing or building EMLy, ensure you have the following installed:
+
+*   **Go**: Version 1.24 or later (Project uses 1.24.4) - [Download](https://go.dev/dl/)
+*   **Wails CLI**: Version v2 - [Installation Guide](https://wails.io/docs/gettingstarted/installation)
+*   **Node.js**: Required for the frontend build tools.
+*   **Bun**: The project uses `bun` as the frontend package manager. - [Install Bun](https://bun.sh/)
+    *   Install via: `powershell -c "irm bun.sh/install.ps1 | iex"` (Windows) or `curl -fsSL https://bun.sh/install | bash` (macOS/Linux).
+
+## Installation
+
+1.  Clone the repository:
+    ```bash
+    git clone https://github.com/yourusername/EMLy.git
+    cd EMLy
+    ```
+
+2.  Install frontend dependencies:
+    ```bash
+    cd frontend
+    bun install
+    cd ..
+    ```
+
+    *Note: The Wails build process is configured to handle `bun install` automatically if you run `wails build`, but running it manually ensures your IDE is happy.*
 
 ## Live Development
 
-To run in live development mode, run `wails dev` in the project directory. This will run a Vite development
-server that will provide very fast hot reload of your frontend changes. If you want to develop in a browser
-and have access to your Go methods, there is also a dev server that runs on http://localhost:34115. Connect
-to this in your browser, and you can call your Go code from devtools.
+To run the application in development mode with hot-reload:
+
+```bash
+wails dev
+```
+
+*   This starts the Go backend and a Vite development server for the frontend.
+*   The application window will open automatically.
+*   You can also access the frontend in a browser at `http://localhost:34115` to debug with standard browser devtools (though backend calls will still route to the running Go process).
 
 ## Building
 
-To build a redistributable, production mode package, use `wails build`.
+To build a redistributable, production-ready binary:
+
+```bash
+wails build
+```
+
+The output binary will be located in the `build/bin` directory.
+
+### Cross-Compilation & Installers
+
+The project contains configuration for building installers:
+*   **Windows**: NSIS script located in `build/windows/installer/project.nsi`.
+*   **MacOS**: Bundle configuration in `build/darwin/`.
+
+To build with specific platform targets (if your environment supports it):
+
+```bash
+wails build -platform windows/amd64
+```
+
+## Testing
+
+### Frontend Tests
+Run the Svelte check to ensure type safety and valid Svelte code:
+
+```bash
+cd frontend
+bun run check
+```
+
+### Backend Tests
+To run Go unit tests (if any are added to `backend/`) or standard Go tests:
+
+```bash
+go test ./...
+```
+