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CONTRIBUTING.md

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+# Contributing to server-side-template-for-gtm-v2
+
+Thank you for your interest in contributing to `server-side-template-for-gtm-v2`! We value your time and effort to make this project better. This document outlines the guidelines and security best practices for contributing to this repository.
+
+## Security and Compliance Guidelines
+
+This repository follows strict security protocols to protect sensitive information and ensure code quality. Please adhere to the following guidelines:
+
+### 1. Sensitive Information
+- Do not include any hard-coded credentials, sensitive information, or deployment details in your contributions.
+- Ensure that your commits and pull requests do not reference internal systems or private repositories.
+
+### 2. Signed Commits
+- All commits must be signed using GPG to verify authenticity.
+  - Generate a GPG key with a key size of 4096 and no expiration.
+  - Use your official email address (e.g., `you@domain.com`) when generating the key.
+  - Refer to GitHub’s [guide on signing commits](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits) for instructions.
+
+### 3. Push and Branch Protections
+- Contributions should be made via pull requests; direct pushes to the main branch are not allowed.
+- All pull requests must pass branch protection rules, including code review and CI checks.
+
+### 4. Vulnerability Reporting
+- If you discover a vulnerability, please use the [Private Vulnerability Reporting](https://docs.github.com/en/code-security/repository-security-advisories/privately-reporting-a-security-vulnerability) feature to report it securely.
+- Public discussion of vulnerabilities is prohibited until a fix is deployed.
+
+### 5. Code Review
+- All contributions from external users must be reviewed by at least two maintainers or approved developers from our team.
+- Ensure pull requests include tests and documentation for new features or changes.
+
+### 6. Secret Scanning
+- This repository has secret scanning and push protection enabled.
+- Contributions containing sensitive information (e.g., API keys or passwords) will be automatically rejected.
+
+### 7. PR Guidelines
+- Do not include links to testing environments or sensitive internal documentation in your pull request comments or descriptions.
+- Write clear and concise commit messages and PR descriptions.
+
+---
+
+## How to Contribute
+
+1. **Fork the Repository**
+   - Fork the repository to your own GitHub account and clone it locally.
+
+2. **Create a Feature Branch**
+   - Create a branch for your changes using the naming convention `feature/<feature-name>` or `bugfix/<issue-number>`.
+
+3. **Make Changes**
+   - Write clean and documented code.
+   - Test your changes locally to ensure they work as expected.
+
+4. **Submit a Pull Request**
+   - Push your branch to your fork and open a pull request to the main repository.
+   - Provide a detailed description of your changes and reference any related issues.
+
+---
+
+## Licensing
+
+By contributing to this repository, you agree that your contributions will be licensed under the same license as the repository. For more details, see [LICENSE](LICENSE).
+
+---
+
+For any questions or further clarification, feel free to open an issue or contact the maintainers.