[Setup] Install Node.js and Configure MongoDB for Backend.

[akashsingh6474]

Summary

The purpose of this PR is to set up the backend environment by installing Node.js using NVM, configuring MongoDB for local development, and importing sample data into the database. Additionally, it verifies the correct installation of Node.js and npm, and starts the backend server to ensure the setup is complete.

Description

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Issue(s) Addressed

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Prerequisites

• [ ] Have you followed all the CONTRIBUTING GUIDELINES?

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[github-actions[bot]]

Umm... did someone forget to read the style guide? Fix that PR title and let's try again! @akashsingh6474 Don't worry, it happens to the best of us! Check out our contributor guidelines for more details.

[akashsingh6474]

This PR sets up the backend by installing Node.js via NVM, configuring MongoDB,

and importing sample data into the MongoDB database.

It also includes environment variable configuration and ensures that the server runs correctly.