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>

main.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"context"
+	"embed"
+	"flag"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"skyview/internal/config"
+	"skyview/internal/server"
+)
+
+//go:embed static/*
+var staticFiles embed.FS
+
+func main() {
+	daemon := flag.Bool("daemon", false, "Run as daemon (background process)")
+	flag.Parse()
+
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("Failed to load configuration: %v", err)
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	srv := server.New(cfg, staticFiles, ctx)
+
+	log.Printf("Starting skyview server on %s", cfg.Server.Address)
+	log.Printf("Connecting to dump1090 SBS-1 at %s:%d", cfg.Dump1090.Host, cfg.Dump1090.DataPort)
+
+	httpServer := &http.Server{
+		Addr:    cfg.Server.Address,
+		Handler: srv,
+	}
+
+	go func() {
+		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("Server failed to start: %v", err)
+		}
+	}()
+
+	if *daemon {
+		log.Printf("Running as daemon...")
+		select {}
+	} else {
+		log.Printf("Press Ctrl+C to stop")
+		
+		sigChan := make(chan os.Signal, 1)
+		signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+		<-sigChan
+		
+		log.Printf("Shutting down...")
+		cancel()
+		
+		shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer shutdownCancel()
+		
+		if err := httpServer.Shutdown(shutdownCtx); err != nil {
+			log.Printf("Server shutdown error: %v", err)
+		}
+	}
+}