feat: update READMe add goreportcard

README.md

@@ -57,4 +57,23 @@ client:
 Then you can just run 
 ```bash
 go run main.go
+```
+
+## goreportcard
+```bash
+make goreportcard
+```
+output:
+```bash
+goreportcard-cli -v
+Grade ........... A+ 94.1%
+Files .................. 9
+Issues ................. 1
+gofmt ............... 100%
+go_vet .............. 100%
+gocyclo ............. 100%
+ineffassign ......... 100%
+license ............... 0%
+
+misspell ............ 100%
 ```