Gym Management System

A full-stack web application to manage gym operations — including membership registration, employee management, trainer bookings, salary payments, and reporting.
Built with Next.js (React) on the frontend and Express.js (Node.js) on the backend.

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✨ Features

• Authentication: Employees (Manager, Receptionist, Trainer) can log in securely.
• Member Management: Register, edit, and manage gym members.
• Cost Management: Define and manage service fees (e.g., treadmill, cycling) for different durations (1 month, 6 months, 1 year).
• Employee Salary Management: Pay salaries, track work days, and manage unpaid salaries.
• Trainer Management: View trainers, their details, and personal training session requests.
• Personal Training Booking: Receptionists can request trainers for personal training sessions; trainers can accept/reject requests.
• Reports: Generate reports for user counts, salary payments, and filter by time periods (week, month, lifetime).
• Role-based Access: Manager, Receptionist, and Trainer roles with different permissions.

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🛠 Technologies Used

• Frontend: Next.js, Tailwind CSS
• Backend: Express.js, Node.js
• Database: PostgreSQL
• Authentication: JWT (JSON Web Tokens)
• State Management: Redux
• Other Tools: Axios, dotenv, etc.

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🚀 Getting Started

Follow these steps to run the project locally:

1. Clone the Repository

git clone https://github.com/your-username/your-repo-name.git
cd your-repo-name

2. Start the Client (Frontend - Next.js)

cd client
npm install
npm run dev

The frontend will be running at http://localhost:3000.

3. Start the Server (Backend - Express.js)

Open a new terminal window, then:

cd server
npm install
npm run dev

The backend will be running at http://localhost:3001

4. ⚙️ Environment Variables

You need to create .env files for both client and server.

Example for /server/.env:

# ---------------------------
# Server Configuration
# ---------------------------
PORT=3001
NODE_ENV=development # (development|production)

# ---------------------------
# Database Configuration
# ---------------------------
DB_HOST=your-host-name
DB_PORT=your-post-database
DB_USER=your-post-database-user
DB_PASSWORD=your-database-password
DB_NAME=your-database-name
# ---------------------------
# JWT Configuration
# ---------------------------
JWT_SECRET=your-secret-key
JWT_EXPIRES_IN=your-jwt-expires-in

Example for /client/.env:

NODE_ENV=development
SERVER_URL=http://localhost:3001

5. Project Structure

/client    --> Frontend (Next.js App)
/server    --> Backend (Express.js Server)