chore: add User-Agent to healthcheck request

internal/healthcheck.go

@@ -43,6 +43,8 @@ func (health Health) Check() error {
 			InsecureSkipVerify: health.InsecureSkipVerify, // Skip SSL certificate verification
 		},
 	}
+	//Set user-agent
+	healthReq.Header.Set("User-Agent", fmt.Sprintf("Goma-Gateway/%s", util.Version))
 	// Perform the request to the route's healthcheck
 	client := &http.Client{Transport: transport, Timeout: health.TimeOut}
 	healthResp, err := client.Do(healthReq)