upd Dockerfile

Dockerfile

@@ -4,10 +4,14 @@ ENV GO111MODULE=on
 RUN apk update && \
     apk upgrade && \
     apk add git gcc libc-dev linux-headers
-RUN go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/client && go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/server
+RUN git clone https://github.com/xtaci/kcptun.git
+RUN cd kcptun && \
+	go build -mod=vendor -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" -o /client github.com/xtaci/kcptun/client && \
+	go build -mod=vendor -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" -o /server github.com/xtaci/kcptun/server
 
 FROM alpine:3.18
 RUN apk add --no-cache iptables
-COPY --from=builder /go/bin /bin
+COPY --from=builder /client /bin
+COPY --from=builder /server /bin
 EXPOSE 29900/udp
 EXPOSE 12948