Create SECURITY.md

Author: tharun977

SECURITY.md

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+# 🔒 Security Policy  
+
+## 🛠 Supported Versions  
+
+The table below lists the **supported versions** of MinePong that receive security updates.  
+
+| Version | Supported?         |  
+| ------- | ------------------ |  
+| 5.1.x   | ✅ Actively Supported |  
+| 5.0.x   | ❌ No Longer Supported |  
+| 4.0.x   | ✅ Receiving Security Patches |  
+| < 4.0   | ❌ Deprecated |  
+
+If you are using an **unsupported version**, we highly recommend **upgrading** to the latest stable release to ensure security and stability.  
+
+## 🛡️ Reporting a Vulnerability  
+
+We take **security issues** seriously. If you discover a vulnerability in **MinePong**, please follow these steps:  
+
+1. **📩 Contact Us Privately**  
+   - Report security vulnerabilities via **[tharunraman10@gmail.com]**.  
+   - **DO NOT** disclose vulnerabilities publicly until a fix has been released.  
+
+2. **📄 Provide Details**  
+   - Describe the issue clearly (e.g., steps to reproduce, affected code, possible exploit).  
+   - Mention the **version** affected.  
+   - Include **proof-of-concept (if possible)** to help us verify the issue faster.  
+
+3. **⏳ Response Time**  
+   - You will receive an **initial acknowledgment** within **48 hours**.  
+   - A **fix or mitigation plan** will be provided within **7-14 days**, depending on the severity.  
+
+4. **🔒 Disclosure Policy**  
+   - Once patched, vulnerabilities will be disclosed **responsibly**.  
+   - Critical vulnerabilities will be disclosed **only after** a fix is available to avoid exploitation.  
+
+## 🔑 Security Best Practices  
+
+To keep your game secure, we recommend:  
+
+✅ Always running the **latest version** of MinePong.  
+✅ Using secure **browser settings** and **HTTPS** when hosting the game.  
+✅ Avoiding **untrusted modifications** or third-party scripts.  
+
+## 📢 Stay Updated  
+
+For security **updates and announcements**, check:  
+
+- **[GitHub Issues](https://github.com/tharun977/minepong/issues)**  
+- **[Official Releases](https://github.com/tharun977/minepong/releases)**  
+
+---
+
+If you have any **questions** or **security concerns**, feel free to reach out. Thank you for helping keep **MinePong** safe! 🛡️🎮