added handler of choose payment

main.go

@@ -8,6 +8,7 @@ import (
 func main() {
 	readConfig()
 	http.HandleFunc("/", StartPay)
+	http.HandleFunc("/choosePayment", choosePayment)
 	http.HandleFunc("/rpnNameAndCard", rpnNameAndCard)
 	// http.HandleFunc("/", Index)
 	// http.HandleFunc("/show", Show)