fix: add err check

main.go

@@ -1,11 +1,14 @@
 package main
 
 import (
-	"net/http"
 	"k8s-example/hello"
+	"net/http"
 )
 
 func main() {
 	http.HandleFunc("/hello", hello.Handler)
-	http.ListenAndServe(":8800", nil)
-}
+	err := http.ListenAndServe(":8800", nil)
+	if err != nil {
+		panic(err)
+	}
+}