go run main.go
go run client/client.go
you can learn more about echo framework function for handler(http.handler) etc. WrapHandler function can convert http.handler (net/http) to HandlerFunc (echo framework) (ง'̀-'́)ง . (ง'̀-'́)ง . (ง'̀-'́)ง . (ง'̀-'́)ง
https://github.com/labstack/echo/blob/master/echo.go#L708
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