Add Contribution Guidelines for Next.js Project

[suryakantkasare]

Issue Description

Title: Add Contribution Guidelines

Description: As a contributor, I would like to have clear guidelines and instructions on how to contribute to this Next.js project. This will help ensure a smooth collaboration and provide a better understanding of the contribution process.

Proposed Solution

• [ ] Create a new file named CONTRIBUTING.md in the project root directory.
• [ ] Add detailed guidelines and instructions for contributing to the project, including steps to set up the project locally, prerequisites, submitting issues, working on issues, and creating pull requests.
• [ ] Include information on how to star the repository and provide a link to the repository page.
• [ ] Mention the importance of including the updated .env.local file in pull requests when necessary.
• [ ] Provide a code of conduct section to promote respectful and inclusive collaboration.
• [ ] Add the project's license information.
• [ ] Include the following .env.local template in the guidelines:

NEXT_PUBLIC_FIREBASE_API_KEY=
NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN=
NEXT_PUBLIC_FIREBASE_PROJECT_ID=
NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET=
NEXT_PUBLIC_FIREBASE_SENDER_ID=
NEXT_PUBLIC_FIREBASE_APP_ID=
NEXT_PUBLIC_FIREBASE_MEASUREMENT_ID=
FIREBASE_CLIENT_EMAIL=
FIREBASE_DATABASE_URL=
FIREBASE_PRIVATE_KEY=
FIREBASE_PROJECT_ID=

Note: When working with authentication, please use your own Firebase demo project and fill in the appropriate values in the .env.local file.

Additional Information [Add any additional information or context about the issue that may be helpful.]

[shravni21]

Kindly assign me the issue, I will try my best.