log errors - error handling still bad

rename folder

Makefile

@@ -1,2 +1,2 @@
 go-build:
-	go build cmd/http/main.go	
+	go build cmd/server/main.go	

pkg/udpproxy/session.go

@@ -48,6 +48,7 @@ func (s *Session) proxyFrom(buf []byte) error {
 	s.updateTime = time.Now()
 	_, err := s.proxyConn.WriteToUDP(buf, s.caddr)
 	if err != nil {
+		log.Println(err)
 		return err
 	}