chore: add Security Reporting Instructions (#1370)

Author: lferrigno

.github/SECURITY.md

@@ -0,0 +1,36 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+We take the security of our project seriously. If you discover a vulnerability, we encourage you to report it responsibly so we can address it promptly. 
+
+### How to Report
+
+1. Navigate to the **Security** tab of this repository.
+2. Click on **"Report a Vulnerability"** to open the GitHub Security Advisories form.
+3. Fill out the form with as much detail as possible, including:
+   - A clear description of the issue.
+   - Steps to reproduce the vulnerability.
+   - The affected versions or components.
+   - Any potential impact or severity details.
+
+Alternatively, you can send an email to **[security@lambdaclass.com](mailto:security@lambdaclass.com)** with the same details.
+
+### Guidelines for Reporting
+
+- **Do not publicly disclose vulnerabilities** until we have confirmed and fixed the issue.
+- Include any proof-of-concept code, if possible, to help us verify the vulnerability more efficiently.
+- If applicable, specify if the vulnerability is already being exploited.
+
+### Our Response Process
+
+- We commit to handling reports with diligence.
+- We will investigate all reported vulnerabilities thoroughly and transparently.
+- Once the vulnerability has been fixed, we will disclose the details publicly to ensure awareness and understanding.
+
+
+### Reward Program
+
+While we do not currently offer a formal bug bounty program, we value your contribution and will recognize your efforts in our changelog or release notes (if you consent).
+
+Thank you for helping us improve the security of our project!

README.md

@@ -3,6 +3,16 @@
 [![CI](https://github.com/lambdaclass/lambda_ethereum_consensus/actions/workflows/ci.yml/badge.svg)](https://github.com/lambdaclass/lambda_ethereum_consensus/actions/workflows/ci.yml)
 [![Telegram chat](https://img.shields.io/endpoint?url=https%3A%2F%2Ftg.sumanjay.workers.dev%2Flambdaconsensus%2F&logo=telegram&label=chat&color=neon)](https://t.me/lambdaconsensus)
 
+## Security
+
+We take security seriously. If you discover a vulnerability in this project, please report it responsibly. 
+
+- You can report vulnerabilities directly via the **[GitHub "Report a Vulnerability" feature](../../security/advisories/new)**.
+- Alternatively, send an email to **[security@lambdaclass.com](mailto:security@lambdaclass.com)**.
+
+For more details, please refer to our [Security Policy](./.github/SECURITY.md).
+
+
 ## Prerequisites
 
 ### Direct Installation