fix(watchdog): fix watchdog unable to send webhook and simplify the parsing of json config

- Change webhook config headers and body from map to string format
- Move command parsing logic to separate function in command.go
- Add debug logging for webhook operations
- Improve exception handling with proper JSON parsing
- Simplify config loading logic with default values

global/global.go

@@ -51,53 +51,49 @@ type Config struct {
 	Debug        bool   `json:"debug"`
 	Watchdog     struct {
 		Enabled bool `json:"enabled"`
-		Port int `json:"port"`
+		Port    int  `json:"port"`
 	} `json:"watchdog"`
 	Notification struct {
-		Enabled bool `json:"enabled"`
+		Enabled bool   `json:"enabled"`
 		Method  string `json:"method"`
 	} `json:"notification"`
 	Webhook struct {
-		Method string `json:"method"`
-		URL    string `json:"url"`
-		Headers map[string]string `json:"headers"`
-		Body    map[string]string `json:"body"`
+		Method  string            `json:"method"`
+		URL     string            `json:"url"`
+		Headers string `json:"headers"`
+		Body    string `json:"body"`
 	} `json:"webhook"`
 }
 
 var CurrentConfig = Config{
-	ListenAddr: "0.0.0.0",
-	ListenPort: "7000",
-	FrpcPath:   "",
+	ListenAddr:   "0.0.0.0",
+	ListenPort:   "7000",
+	FrpcPath:     "",
 	InstancePath: "",
 	Debug:        false,
-	Watchdog:     struct {
+	Watchdog: struct {
 		Enabled bool `json:"enabled"`
-		Port int `json:"port"`
+		Port    int  `json:"port"`
 	}{
 		Enabled: false,
-		Port: 0,
+		Port:    0,
 	},
 	Notification: struct {
-		Enabled bool `json:"enabled"`
+		Enabled bool   `json:"enabled"`
 		Method  string `json:"method"`
 	}{
 		Enabled: false,
 		Method:  "webhook",
 	},
 	Webhook: struct {
-		Method string `json:"method"`
-		URL    string `json:"url"`
-		Headers map[string]string `json:"headers"`
-		Body    map[string]string `json:"body"`
+		Method  string            `json:"method"`
+		URL     string            `json:"url"`
+		Headers string `json:"headers"`
+		Body   string `json:"body"`
 	}{
 		Method: "",
 		URL:    "",
-		Headers: map[string]string{
-			"Content-Type": "",
-		},
-		Body: map[string]string{
-			"text": "",
-		},
+		Headers: "Content-Type: application/json",
+		Body: "",
 	},
 }