Remove curl progress info in Dockerfile

Dockerfile

@@ -48,7 +48,7 @@ ENV GOROOT=/usr/local/go GOPATH=/root/gopath
 # should not be in the same line with GOROOT definition, otherwise docker build could not find GOROOT.
 ENV PATH=${PATH}:${GOROOT}/bin:${GOPATH}/bin
 # install glide
-RUN curl -q https://glide.sh/get | sh
+RUN curl -s -q https://glide.sh/get | sh
 
 # git credential to skip password typing
 RUN git config --global credential.helper store