CelestialGallery is a full-stack web application developed during the 2025 Hackathon to enable users to upload, share, and explore stunning astronomy images. It features user registration, secure login, image uploads with descriptions, and interactive functionalities like liking and reporting images.

• User Authentication: Register, login, and logout securely.
• Image Uploads: Upload celestial images with titles and descriptions.
• Gallery View: Browse all uploaded images with uploader info.
• Interaction: Like images and report inappropriate content (auto-removal after 5 reports).
• My Uploads: View and manage your own images.
• Responsive Design: Optimized for desktop and mobile devices.

• Backend: Node.js, Express, MongoDB, Mongoose
• Frontend: HTML, CSS, JavaScript
• Authentication: express-session, bcrypt
• File Uploads: multer
• Security: helmet, express-mongo-sanitize
• Environment Management: dotenv
• File System: fs

1. Clone the repository

   git clone https://github.com/umamanipraharshitha/CelestialGallery.git
   cd CelestialGallery

2. Install dependencies

   npm install

3. Set up environment variables

Create a .env file in the root directory:

MONGO_URI=your_mongodb_connection_string
SESSION_SECRET=your_session_secret

4. Create uploads folder

   mkdir -p public/uploads

5. Start the server

   npm start

The app will run at http://localhost:3000.

• Register a new account or log in.
• Upload your astronomy images.
• Like and report images in the gallery.
• View and manage your uploads in the "My Uploads" section.
• If the reports on a image > 5 , then the image will be removed automatically.

• Passwords are hashed with bcrypt.
• Sessions are protected and sensitive data is never committed.