diff --git a/Dockerfile b/Dockerfile
index c4c581f..1bfd1d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,10 @@
 FROM ubuntu:14.04
 MAINTAINER zhouyq@goodrain.com
 
-ENV  GOSU_BIN="gosu rain"
+RUN echo "Asia/Shanghai" > /etc/timezone;dpkg-reconfigure -f noninteractive tzdata
+RUN groupadd -r -g 200 discourse && useradd -r -u 200 -g discourse discourse
+
+ENV  GOSU_BIN="gosu discourse"
 ENV  APP_DIR="/app/discourse"
 ENV  PERMANENT_DIR="/data"
 ENV  BUILD_DIR="/tmp/build"
@@ -14,7 +17,26 @@ COPY build $BUILD_DIR
 COPY usr /usr
 COPY etc /etc
 
-RUN $BUILD_DIR/build.sh
+RUN $BUILD_DIR/build.sh system_init
+
+RUN $BUILD_DIR/build.sh install_packages
+
+RUN $BUILD_DIR/build.sh install_gosu
+
+RUN $BUILD_DIR/build.sh install_libjemalloc
+
+RUN $BUILD_DIR/build.sh install_gifsicle
+
+RUN $BUILD_DIR/build.sh install_pngcrush
+
+RUN $BUILD_DIR/build.sh install_pngquant
+
+RUN $BUILD_DIR/build.sh install_ruby
+
+RUN $BUILD_DIR/build.sh install_discourse
+
+RUN $BUILD_DIR/build.sh install_nginx
+
 RUN $BUILD_DIR/cleanup
 
 VOLUME $PERMANENT_DIR