Add troubleshooting guide for LaravelFS on Ubuntu

Provide steps to resolve the "command not found" issue caused by Composer's bin folder not being in the PATH. This enhances the README's usability for Ubuntu users.

Author: HichemTab-tech

README.md

@@ -131,6 +131,34 @@ A starter kit must meet the following requirements:
 
 ---
 
+## **🐧 Ubuntu Users: Fixing LaravelFS Command Not Found Issue**
+
+If you installed LaravelFS but **can’t run the `laravelfs` command**,
+it might be because Composer's global bin folder is **not in your system's PATH**.
+
+### **🔧 Solution: Add Composer Bin to PATH**
+1️⃣ Open your terminal and edit the `~/.bashrc` file:
+   ```sh
+   nano ~/.bashrc
+   ```  
+_(If needed, use `sudo nano ~/.bashrc`)_
+
+2️⃣ Add this line at the **bottom** of the file:
+   ```sh
+   export PATH="$PATH:$HOME/.config/composer/vendor/bin"
+   ```  
+
+3️⃣ Save the file (`CTRL + X`, then `Y`, then `Enter`).
+
+4️⃣ Apply the changes:
+   ```sh
+   source ~/.bashrc
+   ```  
+
+✅ Now, try running `laravelfs` again—it should work! 🚀
+
+---
+
 ## **Contributing**
 Thank you for considering contributing to LaravelFS! We welcome contributions to improve the installer and keep it updated. Please submit issues and pull requests to the [GitHub repository](https://github.com/HichemTab-tech/LaravelFS).