Fix docker build error

proxy/Dockerfile

@@ -1,14 +0,0 @@
-ARG THIS_ARCH_ALT=amd64
-FROM ${THIS_ARCH}/debian:buster
-
-LABEL Lan Tian "lantian@lantian.pub"
-ENV GOOS=linux GOARCH=${THIS_ARCH_GO}
-WORKDIR /root
-COPY . .
-RUN apt-get -qq update && DEBIAN_FRONTEND=noninteractive apt-get -qq install -y golang traceroute \
-  && cd /root && go build -o /proxy \
-  && cd / && rm -rf /root/* \
-  && apt-get -qq purge -y golang \
-  && apt-get -qq autoremove --purge -y && apt-get clean && rm -rf /var/lib/apt/lists
-
-ENTRYPOINT ["/proxy"]