feat: initial gateway implementation

pkg/config/config.go

@@ -0,0 +1,39 @@
+package config
+
+import (
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// Config holds application configuration
+type Config struct {
+	HTTPPort string
+	UDPPort  string
+	LogLevel string
+}
+
+// Load loads configuration from file or environment variables
+func Load(configFile string) *Config {
+	cfg := &Config{
+		HTTPPort: getEnvOrDefault("HTTP_PORT", "3001"),
+		UDPPort:  getEnvOrDefault("UDP_PORT", "4210"),
+		LogLevel: getEnvOrDefault("LOG_LEVEL", "info"),
+	}
+
+	// TODO: Load from config file if provided
+	if configFile != "" {
+		log.WithField("file", configFile).Info("Loading configuration from file")
+		// Implement file loading here if needed
+	}
+
+	return cfg
+}
+
+// getEnvOrDefault returns environment variable value or default
+func getEnvOrDefault(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}