Dockerfile: fix production dockefile when WITH_GOLONG=OFF.

paddle/scripts/paddle_build.sh

@@ -405,7 +405,7 @@ function gen_dockerfile() {
 
     cat <<EOF
     ========================================
-    Generate /paddle/build/Dockerfile ...
+    Generate ${PADDLE_ROOT}/build/Dockerfile ...
     ========================================
 EOF
 
@@ -429,7 +429,7 @@ EOF
         CMD='"true"'
     fi
 
-    cat >> /paddle/build/Dockerfile <<EOF
+    cat >> ${PADDLE_ROOT}/build/Dockerfile <<EOF
     ADD python/dist/*.whl /
     # run paddle version to install python packages first
     RUN apt-get update &&\
@@ -443,8 +443,14 @@ EOF
     ${DOCKERFILE_CUDNN_DSO}
     ${DOCKERFILE_GPU_ENV}
     ENV NCCL_LAUNCH_MODE PARALLEL
+EOF
+    if [[ ${WITH_GOLANG:-OFF} == "ON" ]]; then
+        cat >> ${PADDLE_ROOT}/build/Dockerfile <<EOF
         ADD go/cmd/pserver/pserver /usr/bin/
         ADD go/cmd/master/master /usr/bin/
+EOF
+    fi
+    cat >> ${PADDLE_ROOT}/build/Dockerfile <<EOF
     # default command shows the paddle version and exit
     CMD [${CMD}]
 EOF