Add NATS deployment and service configuration, integrate environment variables, and update server to support NATS and Redis connections.

cmd/server/main.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"io/ioutil"
 	"log"
+	"os"
 	"path/filepath"
 	"sync"
 
@@ -29,12 +30,14 @@ func main() {
 	loadServerAssets(globalWorld)
 
 	// 1b. Redis-Leaderboard initialisieren
-	if err := server.InitLeaderboard("localhost:6379"); err != nil {
+	redisAddr := getEnv("REDIS_ADDR", "localhost:6379")
+	if err := server.InitLeaderboard(redisAddr); err != nil {
 		log.Fatal("❌ Konnte nicht zu Redis verbinden: ", err)
 	}
+	log.Printf("✅ Verbunden mit Redis: %s", redisAddr)
 
 	// 2. NATS VERBINDUNG
-	natsURL := "nats://localhost:4222"
+	natsURL := getEnv("NATS_URL", "nats://localhost:4222")
 	nc, err := nats.Connect(natsURL)
 	if err != nil {
 		log.Fatal("❌ Konnte nicht zu NATS verbinden: ", err)
@@ -179,6 +182,13 @@ func main() {
 	}
 }
 
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}
+
 func loadServerAssets(w *game.World) {
 	assetDir := "./cmd/client/web/assets"
 	chunkDir := filepath.Join(assetDir, "chunks")