Added Contributing.md file

Contributing.md

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+# Contributing Guidelines
+
+Thank you for your interest in contributing to the Customer Relations Management tool built in the MERN stack! We appreciate your help in making this project better.
+
+## Features of the App
+
+The app has three sections:
+
+### Employer
+The employer section allows users to access details about service requests, leads, and contacts.
+
+### Service Request
+The service request section contains details about a service requested from the employer. 
+
+## Contributing Process
+
+1. Fork the repository.
+2. Create a new branch with a descriptive name:
+```
+git checkout -b <branch-name>
+```
+3. Make changes and ensure that the code is properly formatted.
+4. Commit your changes:
+```
+git commit -m "A brief description of your changes"
+```
+5. Push your changes to the branch:
+```
+git push origin <branch-name>
+```
+6. Create a pull request.
+
+## Code Style
+
+Please follow the code style used in the project. We use the following tools for linting and formatting:
+
+- ESLint for JavaScript.
+
+## Issues
+
+Please check the issues page to see if your issue has already been reported. If not, please create a new issue with a descriptive title and detailed description.
+
+## Pull Requests
+
+Please follow the pull request template and provide as much detail as possible. We appreciate your help in making this project better.
+
+Thank you!