docs: add more description about pre-launch hook

README.md

@@ -2,7 +2,7 @@
 An standalone updater for packwiz modpacks with simple commands. No need to install Java anymore!  
 I hope it replaces [packwiz-installer](https://github.com/packwiz/packwiz-installer) and [packwiz-installer-bootstrap](https://github.com/packwiz/packwiz-installer-bootstrap).  
 
-# Usage
+## Usage
 1. [Download binary from release](https://github.com/ookkoouu/packwiz-install/releases/latest) and put it on `.minecraft` folder.
 2. Run install command.
 ```
@@ -31,5 +31,14 @@ Flags:
 
 ## Update on launch game
 1. Bundle binary with your modpack.
-2. Set `packwiz-install i <URL>` to Pre-Launch Hook. The hook feature is available in [Prism Launcher](https://prismlauncher.org/), [Modrinth App](https://modrinth.com/app) etc.
-3. Start the game as usual.
+2. Set Pre-Launch Hook to player's launcher. The hook feature is available in [Prism Launcher](https://prismlauncher.org/), [Modrinth App](https://modrinth.com/app) etc.
+    ![image](https://github.com/ookkoouu/packwiz-install/assets/29059223/cd22914c-d09a-46e6-8852-bf3cff78fc3e)
+    ### Windows
+    ```
+    cmd /c packwiz-install install <URL>
+    ```
+    ### Linux
+    ```
+    sh -c 'packwiz-install install <URL>'
+    ```
+4. Start the game as usual.