Initial implementation of SkyView - ADS-B aircraft tracker

- Go application with embedded static files for dump1090 frontend
- TCP client for SBS-1/BaseStation format (port 30003)
- Real-time WebSocket updates with aircraft tracking
- Modern web frontend with Leaflet maps and mobile-responsive design
- Aircraft table with filtering/sorting and statistics dashboard
- Origin configuration for receiver location and distance calculations
- Automatic config.json loading from current directory
- Foreground execution by default with optional -daemon flag

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

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+# SkyView - ADS-B Aircraft Tracker
+
+A modern web frontend for dump1090 ADS-B data with real-time aircraft tracking, statistics, and mobile-responsive design.
+
+## Features
+
+- **Real-time Aircraft Tracking**: Live map with aircraft positions and flight paths
+- **Interactive Map**: Leaflet-based map with aircraft markers and optional trails
+- **Aircraft Table**: Sortable and filterable table view with detailed aircraft information
+- **Statistics Dashboard**: Real-time statistics and charts for signal strength, aircraft counts
+- **WebSocket Updates**: Real-time data updates without polling
+- **Mobile Responsive**: Optimized for desktop, tablet, and mobile devices
+- **Single Binary**: Embedded static files for easy deployment
+
+## Configuration
+
+### Environment Variables
+
+- `SKYVIEW_ADDRESS`: Server listen address (default: ":8080")
+- `SKYVIEW_PORT`: Server port (default: 8080)  
+- `DUMP1090_HOST`: dump1090 host address (default: "localhost")
+- `DUMP1090_DATA_PORT`: dump1090 SBS-1 data port (default: 30003)
+- `ORIGIN_LATITUDE`: Receiver latitude for distance calculations (default: 37.7749)
+- `ORIGIN_LONGITUDE`: Receiver longitude for distance calculations (default: -122.4194)
+- `ORIGIN_NAME`: Name/description of receiver location (default: "Default Location")
+- `SKYVIEW_CONFIG`: Path to JSON configuration file
+
+### Configuration File
+
+SkyView automatically loads `config.json` from the current directory, or you can specify a path with `SKYVIEW_CONFIG`.
+
+Create a `config.json` file (see `config.json.example`):
+
+```json
+{
+  "server": {
+    "address": ":8080", 
+    "port": 8080
+  },
+  "dump1090": {
+    "host": "192.168.1.100", 
+    "data_port": 30003
+  }
+}
+```
+
+### Data Source
+
+SkyView uses **SBS-1/BaseStation format** (Port 30003) which provides decoded aircraft information including:
+- Aircraft position (latitude/longitude)
+- Altitude, ground speed, vertical rate
+- Flight number/callsign
+- Squawk code and emergency status
+
+## Building and Running
+
+### Build
+
+```bash
+go build -o skyview .
+```
+
+### Run
+
+```bash
+# Foreground (default) - Press Ctrl+C to stop
+DUMP1090_HOST=192.168.1.100 ./skyview
+
+# Daemon mode (background process)
+DUMP1090_HOST=192.168.1.100 ./skyview -daemon
+
+# With custom origin location
+DUMP1090_HOST=192.168.1.100 ORIGIN_LATITUDE=59.3293 ORIGIN_LONGITUDE=18.0686 ORIGIN_NAME="Stockholm" ./skyview
+
+# Using config file
+SKYVIEW_CONFIG=config.json ./skyview
+
+# Default (localhost:30003)
+./skyview
+```
+
+### Development
+
+```bash
+go run main.go
+```
+
+## Usage
+
+1. Start your dump1090 instance
+2. Configure SkyView to point to your dump1090 host
+3. Run SkyView
+4. Open your browser to `http://localhost:8080`
+
+## API Endpoints
+
+- `GET /`: Main web interface
+- `GET /api/aircraft`: Aircraft data (parsed from dump1090 TCP stream)
+- `GET /api/stats`: Statistics data (calculated from aircraft data)
+- `GET /ws`: WebSocket endpoint for real-time updates
+
+## Data Sources
+
+SkyView connects to dump1090's **SBS-1/BaseStation format** via TCP port 30003 to receive decoded aircraft data in real-time.
+
+The application maintains an in-memory aircraft database with automatic cleanup of stale aircraft (older than 2 minutes).
+
+## Views
+
+- **Map View**: Interactive map with aircraft positions and trails
+- **Table View**: Sortable table with aircraft details and search
+- **Stats View**: Dashboard with real-time statistics and charts