Added CONTRIBUTING.md file

CONTRIBUTING.MD

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+# Contributing to InterviewAce 🚀
+
+Thanks for checking the project.  I'm excited to have you contribute.
+I've put together the following guidelines to help you figure out where you can best be helpful.
+
+---
+
+## Table of Contents
+
+1. [Tech Stacks Used](#tech-stack)
+    - [Frontend](#frontend)
+    - [AI & Computer Vision](#ai--computer-vision)
+    - [Backend & Database](#backend--database)
+    - [Data Processing](#data-processing)
+    - [UI/UX](#uiux)
+2. [Prerequisites](#prerequisites)
+3. [Here's how to get started](#how-to-get-started)
+    - [Installation](#installation)
+4. [Project Structure](#project-structure)
+5. [Support](#-support)
+
+---
+
+## Tech Stack
+
+### Frontend
+
+- **React 18.3.1**: Modern React with hooks and functional components
+- **TypeScript 5.5.3**: Type-safe development
+- **Vite 5.4.2**: Fast build tool and development server
+- **Tailwind CSS 3.4.1**: Utility-first CSS framework
+- **React Router 6.20.1**: Client-side routing
+- **React Hook Form 7.48.2**: Form management
+- **Lucide React 0.344.0**: Beautiful icons
+
+### AI & Computer Vision
+
+- **Face-API.js 0.22.2**: Face detection and analysis
+- **MediaPipe**: Advanced computer vision capabilities
+- **OpenAI API**: GPT models for evaluation
+- **Google Gemini API**: Alternative AI evaluation
+- **Groq API**: Fast AI inference
+
+### Backend & Database
+
+- **Supabase 2.38.4**: Backend-as-a-Service with PostgreSQL
+- **Real-time subscriptions**: Live data updates
+- **Authentication**: Secure user management
+- **File storage**: Document upload and management
+
+### Data Processing
+
+- **PDF.js 4.0.379**: PDF parsing and analysis
+- **Mammoth 1.6.0**: DOCX file processing
+- **PDF-parse 1.1.1**: PDF text extraction
+
+### UI/UX
+
+- **React Hot Toast 2.4.1**: Beautiful notifications
+- **Chart.js 4.4.0**: Data visualization
+- **React Chart.js 2 5.2.0**: React wrapper for Chart.js
+- **Date-fns 2.30.0**: Date manipulation utilities
+
+---
+
+## Prerequisites
+
+- Node.js (v18 or higher)
+- npm or yarn package manager
+- Modern web browser with camera access (for face monitoring features)
+
+---
+
+## How to Get Started
+
+### Installation
+
+1. **Fork this repository and Clone your forked repository**
+
+   ```bash
+   git clone <your-repo-url>
+   cd Interview01
+   ```
+
+2. **Install dependencies**
+
+   ```bash
+   npm install
+   ```
+
+3. **Set up environment variables**
+
+   Supabase Configuration & AI Provider API Keys
+   >Create a `.env` file in the root directory:
+
+    ```env
+    VITE_SUPABASE_URL=your_supabase_project_url
+    VITE_SUPABASE_ANON_KEY=your_supabase_anon_key
+
+    VITE_OPENAI_API_KEY=your_openai_api_key
+    VITE_GEMINI_API_KEY=your_gemini_api_key
+    VITE_GROQ_API_KEY=your_groq_api_key
+    ```
+
+4. **Start the development server**
+
+   ```bash
+   npm run dev
+   ```
+
+5. **Open your browser**
+
+    Navigate to `http://localhost:5173`
+
+---
+
+## Project Structure
+
+```txt
+src/
+├── components/           # React components
+│   ├── AITools/         # AI-powered tools
+│   ├── Auth/            # Authentication components
+│   ├── Dashboard/       # Main dashboard
+│   ├── Evaluation/      # Evaluation results
+│   ├── History/         # Practice history
+│   ├── Home/            # Landing page
+│   ├── JobTools/        # Job preparation tools
+│   ├── Layout/          # Layout components
+│   ├── Practice/        # Interview practice
+│   ├── Profile/         # User profile
+│   ├── Settings/        # App settings
+│   └── StudyPlan/       # Study plan components
+├── contexts/            # React contexts
+├── data/               # Static data and questions
+├── hooks/              # Custom React hooks
+├── lib/                # Utility libraries
+├── pages/              # Page components
+├── services/           # API services
+└── types/              # TypeScript type definitions
+```
+
+---
+
+## 📞 Support
+
+For support, [email us](mailto:support@interviewace.com) or join our [Slack channel](https://your-slack-channel-link).
+
+---
+
+Built with Om Singh❤️ for the developer community
+
+*Transform your interview preparation with AI-powered coaching and real-time feedback.*