studio einszwovier Web Application

FastAPI-based PDF print cost calculator with automated ink coverage analysis, Matrix integration, and multi-service hub for studio einszwovier Maker Space.

---

🎯 Features

Core Application

• 📄 PDF Cost Calculator: Automated ink coverage analysis with color/B&W detection
• 🖼️ Course Management: Dynamic course list with image gallery and modal viewer
• 📊 Cost Estimation: Per-page breakdown with configurable rates (€/m²)
• 💬 Matrix Integration: Automatic order submission to Matrix room

Integrated Services

• 📚 BookStack Wiki: Documentation and knowledge base (port 6875)
• 🤖 Ollama + Open WebUI: Local LLM chatbot interface (port 8080)
• 📨 Matrix Synapse: Print order collection and payment tracking (port 8008)
• <EFBFBD> Element Web: Browser-based Matrix chat client (port 8082)
• <EFBFBD>🐳 Portainer: Container management dashboard (port 9000)
• 📓 JupyterHub: Multi-user Jupyter notebook server for drone programming (port 8001)
• 🦊 Forgejo: Self-hosted Git service for code collaboration (port 3003)
• 🔄 Watchtower: Automatic container updates every 24 hours

---

🏗️ Architecture

View Mermaid source code

graph TB
    subgraph "studio einszwovier Web Platform"
        LP[🏠 Landing Page<br/>Port 80]
        About[ℹ️ About Page<br/>/about]
        CostCalc[💰 Cost Calculator<br/>/cost]
        
        LP --> About
        LP --> CostCalc
    end

    subgraph "Services Accessible from Landing Page"
        BookStack[<5B> BookStack<br/>Port 6875<br/>Wissenssammlung]
        OpenWebUI[🤖 Open WebUI<br/>Port 8080<br/>LLM Chatbot]
        JupyterHub[<5B> JupyterHub<br/>Port 8001<br/>Python Notebooks]
        Forgejo[🦊 Forgejo<br/>Port 3003<br/>Git Server]
        ElementWeb[<5B> Element Web<br/>Port 8082<br/>Matrix Chat]
        Portainer[<5B> Portainer<br/>Port 9000<br/>Admin Panel]
        
        LP -.->|Link| BookStack
        LP -.->|Link| OpenWebUI
        LP -.->|Link| JupyterHub
        LP -.->|Link| Forgejo
        LP -.->|Link| ElementWeb
        LP -.->|Link| Portainer
    end

    subgraph "Backend Services"
        Synapse[<5B> Synapse<br/>Port 8008<br/>Matrix Server]
        Ollama[🔮 Ollama<br/>Port 11434<br/>LLM Engine]
        MariaDB[(<28> MariaDB<br/>BookStack DB)]
        
        ElementWeb --> Synapse
        OpenWebUI --> Ollama
        BookStack --> MariaDB
        CostCalc --> Synapse
    end

    subgraph "Educational Resources"
        Notebooks[📒 Drone Programming<br/>djitellopy Package]
        GitRepos[📦 Code Repositories<br/>Project Source]
        Knowledge[<5B> Documentation<br/>Guides & Tutorials]
        
        JupyterHub --> Notebooks
        Forgejo --> GitRepos
        BookStack --> Knowledge
    end

    subgraph "Persistent Storage"
        PDFUploads[📁 PDF Files<br/>data/uploads/]
        CoursesCSV[📋 Courses CSV<br/>data/courses.csv]
        MatrixData[(🗄️ Matrix Data<br/>matrix/data/)]
        JupyterVols[(💾 Jupyter Volumes<br/>User Workspaces)]
        ForgejoData[(📚 Forgejo Data<br/>forgejo/data/)]
        
        CostCalc --> PDFUploads
        About --> CoursesCSV
        Synapse --> MatrixData
        JupyterHub --> JupyterVols
        Forgejo --> ForgejoData
    end

    subgraph "Infrastructure"
        Watchtower[🔄 Watchtower<br/>Auto-Updates<br/>Every 24h]
        Network[🌐 einszwovier_network<br/>Docker Network]
    end

    classDef webapp fill:#e3f2fd,stroke:#1976d2,stroke-width:2px
    classDef service fill:#fff3e0,stroke:#f57c00,stroke-width:2px
    classDef backend fill:#e8f5e9,stroke:#388e3c,stroke-width:2px
    classDef storage fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px
    classDef edu fill:#fce4ec,stroke:#c2185b,stroke-width:2px
    classDef infra fill:#fafafa,stroke:#616161,stroke-width:2px

    class LP,About,CostCalc webapp
    class BookStack,OpenWebUI,JupyterHub,Forgejo,ElementWeb,Portainer service
    class Synapse,Ollama,MariaDB backend
    class PDFUploads,CoursesCSV,MatrixData,JupyterVols,ForgejoData storage
    class Notebooks,GitRepos,Knowledge edu
    class Watchtower,Network infra

---

🚀 Quick Start

Prerequisites

On the host system:

• Docker & Docker Compose installed
• curl - for testing and healthchecks (install: brew install curl on macOS)
• Poppler (for pdf2image - included in Docker)
• Port availability: 80, 3003, 6875, 8001, 8008, 8080, 8082, 9000, 11434

Note: Python dependencies are containerized and don't need to be installed on the host.

Installation

1. Clone the repository:

   git clone https://github.com/arontaupe/124-webapp.git
   cd 124-webapp
   

2. Configure environment:

   cp .env.example .env
   nano .env  # Update SERVER_HOSTNAME and passwords
   

3. Start the stack:

   docker compose up -d --build
   

4. Access services:

   • Web App: http://localhost (or http://your-server)
   • BookStack: http://localhost:6875
   • Open WebUI: http://localhost:8080
   • Portainer: http://localhost:9000
   • Matrix: http://localhost:8008
   • Element Web: http://localhost:8082
   • JupyterHub: http://localhost:8001
   • Forgejo: http://localhost:3003
   • Forgejo: http://localhost:3003

First-Time Setup

1. Get Matrix Room ID:

   python get_room_id.py
   

2. Update .env with room ID:

   MATRIX_ROOM="!YourRoomID:${SERVER_HOSTNAME}"
   

3. Restart web container:

   docker compose restart web
   

---

📚 Course Management

Courses are managed via CSV file with optional images:

Add a Course

1. Edit data/courses.csv:

   title,description,dates,offen_fuer,image
   My Course,Learn cool stuff,"Oct '25",Grade 10,/static/images/courses/my-course.jpg
   

2. Add course image (optional):

   cp my-image.jpg static/images/courses/my-course.jpg
   

3. Changes apply immediately (no restart needed)

Course Image Features

• Thumbnail view: 80x80px next to course info
• Hover zoom: Expands to 200x200px on hover
• Click to enlarge: Opens full-size modal viewer
• Auto-cropping: object-fit: cover ensures uniform display

See data/KURSE_README.md for detailed documentation.

---

🔧 Configuration

Environment Variables

Key variables in .env:

# Server Configuration
SERVER_HOSTNAME=your-server.com

# Print Rates (€/m²)
RATE_PER_M2_BLACK=4.0
RATE_PER_M2_COLOR=5.0

# Matrix Integration
MATRIX_USER="@einszwovier:${SERVER_HOSTNAME}"
MATRIX_PASS="your_password"
MATRIX_HOMESERVER="http://${SERVER_HOSTNAME}:8008"
MATRIX_ROOM="!RoomID:${SERVER_HOSTNAME}"

# Service Ports
SYNAPSE_PORT=8008
OLLAMA_PORT=11434
OPENWEBUI_PORT=8080
BOOKSTACK_PORT=6875
PORTAINER_PORT=9000
JUPYTER_PORT=8001
FORGEJO_PORT=3003

# JupyterHub Authentication
JUPYTER_PASSWORD=einszwo4

See .env.example for full configuration.

---

🐳 Docker Services

Service	Image	Port	Purpose	Resources
web	Custom (FastAPI)	80	Main application	1 CPU, 1GB RAM
synapse	matrixdotorg/synapse	8008	Matrix homeserver	2 CPU, 2GB RAM
ollama	ollama/ollama	11434	LLM inference	6 CPU, 16GB RAM
open-webui	ghcr.io/open-webui/open-webui	8080	LLM chat UI	2 CPU, 2GB RAM
bookstack	lscr.io/linuxserver/bookstack	6875	Documentation wiki	Default
bookstack-mariadb	lscr.io/linuxserver/mariadb	3306	Database for BookStack	Default
jupyterhub	Custom (Python 3.13)	8001	Multi-user Jupyter notebooks	2 CPU, 2GB RAM
forgejo	codeberg.org/forgejo/forgejo:11	3003, 222	Git service (web, SSH)	Default
portainer	portainer/portainer-ce	9000, 9443	Container management	Default
watchtower	containrrr/watchtower	-	Auto-updates (24h)	Default

Health Checks

All services have health checks configured:

• web: curl http://localhost:8000/
• synapse: curl http://localhost:8008/_matrix/static/
• ollama: curl http://localhost:11434/
• open-webui: curl http://localhost:8080/
• bookstack: curl http://localhost/
• mariadb: MariaDB query test
• portainer: API status check
• watchtower: Process check

---

📖 Documentation

• SECURITY.md - Security best practices and secrets management
• PORTABILITY.md - Server migration guide
• PRE_RELEASE_CHECKLIST.md - Pre-publication verification
• data/KURSE_README.md - Course management guide

---

🔐 Security

Before deploying to production:

1. ✅ Change all passwords in .env
2. ✅ Generate new BOOKSTACK_APP_KEY
3. ✅ Update Matrix credentials
4. ✅ Configure firewall (restrict Portainer access)
5. ✅ Set up HTTPS/SSL
6. ✅ Enable automated backups

See SECURITY.md for comprehensive security guidelines.

Security Disclosure: If you discover a vulnerability, email einszwovier@gvb-gymnasium.de instead of opening a public issue.

---

🔄 Backup & Restore

Backup All Data

./backup.sh

Creates timestamped backups of:

• BookStack database & files
• Matrix homeserver data
• PDF uploads
• Course data & images
• Environment configuration

Restore from Backup

./restore.sh YYYYMMDD_HHMMSS

---

🚢 Deployment & Portability

This application is designed to be fully portable. To move to a new server:

1. On old server:

   ./backup.sh
   

2. On new server:

   git clone <repo-url>
   cd 124-webapp
   cp .env.example .env
   # Update SERVER_HOSTNAME in .env
   ./restore.sh YYYYMMDD_HHMMSS
   docker compose up -d
   

See PORTABILITY.md for detailed migration guide.

---

🛠️ Development

Local Development

# Option 1: Direct Python (with auto-reload)
python run_app.py

# Option 2: Docker Compose
docker compose up --build

Project Structure

.
├── main.py                 # FastAPI application
├── cost_calculator.py      # PDF analysis logic
├── mailer.py              # Matrix integration
├── templates/             # Jinja2 templates
│   ├── base.html
│   ├── landing.html
│   ├── about.html
│   ├── cost-calculator.html
│   └── result.html
├── static/               # CSS, images, fonts
│   ├── css/style.css
│   ├── images/
│   └── fonts/
├── data/
│   ├── courses.csv       # Course database
│   └── uploads/          # PDF uploads
├── docker-compose.yml    # Service orchestration
├── Dockerfile           # Web app container
└── requirements.txt     # Python dependencies

Key Technologies

• FastAPI - Modern Python web framework
• PyPDF2 - PDF metadata extraction
• pdf2image - PDF to image conversion
• Pillow + NumPy - Image processing & ink analysis
• matrix-nio - Matrix protocol client
• Jinja2 - Template engine
• Gunicorn + Uvicorn - Production WSGI/ASGI servers

---

🤝 Contributing

Contributions are welcome! This is part of studio einszwovier, a collaborative Maker Space.

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

---

📄 License

This project is part of studio einszwovier educational initiative.

---

📞 Contact

studio einszwovier Gabriele-von-Bülow-Gymnasium Tile-Brügge-Weg 63, 13509 Berlin (Tegel)

• Email: einszwovier@gvb-gymnasium.de
• Team: Aron Petau & Friedrich Weber
• Hours: Tuesday - Thursday, 11:00 - 16:00
• Location: Room 124

---

🙏 Acknowledgments

• Matrix.org for the communication protocol
• Ollama team for local LLM support
• BookStack for the documentation platform
• FastAPI community
• All contributors and students of studio einszwovier

---

Made with ❤️ at studio einszwovier Maker Space