增加服务配置参数默认值

config/config.go

 
 // Service 微服务配置
 type Service struct {
-	Port           int      `yaml:"port"`
-	ReadTimeout    int      `yaml:"read_timeout"`
-	WriteTimeout   int      `yaml:"write_timeout"`
-	IdleTimeout    int      `yaml:"idle_timeout"`
-	TrustedProxies []string `yaml:"trusted_proxies"`
+	Port           int    `yaml:"port"`
+	ReadTimeout    int    `yaml:"read_timeout"`
+	WriteTimeout   int    `yaml:"write_timeout"`
+	IdleTimeout    int    `yaml:"idle_timeout"`
+	TrustedProxies string `yaml:"trusted_proxies"`
 }
 
 // 导出接口，防止外部修改
 
 // loadConfig 加载配置文件
 func loadConfig() (*Config, error) {
+
 	configFile, err := findConfigFile()
 	if err != nil {
 		return nil, err
 
 	fmt.Printf("✅ Using config file: %s\n", configFile)
 
+	// 先创建带默认值的配置
+	config := &Config{
+		Service: Service{
+			Port:           8080,
+			ReadTimeout:    30,
+			WriteTimeout:   30,
+			IdleTimeout:    60,
+			TrustedProxies: "",
+		},
+	}
 	// 读取配置文件
 	data, err := os.ReadFile(configFile)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read config file %s: %v", configFile, err)
 	}
 
-	var config Config
 	err = yaml.Unmarshal(data, &config)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse config file: %v", err)
 	}
 
-	return &config, nil
+	return config, nil
 }
 
 // findConfigFile 查找配置文件
 		exeDir = filepath.Dir(exePath)
 	}
 
-	return "", fmt.Errorf(`No configuration file found!
+	return "", fmt.Errorf(`no configuration file found!
 
 Tried locations:
 1. Executable directory: %s/db.yaml
 2. Environment variable: DB_CONFIG_PATH
 
 Solutions:
-- Place db.yaml in the same directory as the executable
+- Place db.yaml in the same directory as the executable  
 - Or set DB_CONFIG_PATH environment variable to config file path
 
 Example: