diff --git a/Dockerfile b/Dockerfile
index 965818a0..04a66400 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,20 +13,22 @@ ENV NODE_VERSION 8.12.0
 ENV WORK_DIR /opt/crawlab
 
 # install pkg
-RUN apt-get update
-RUN apt-get install -y curl git net-tools iputils-ping ntp gnupg2
+RUN apt-get update \
+	&& apt-get install -y curl git net-tools iputils-ping ntp gnupg2 nginx redis python python3 python3-pip \
+	&& service redis-server start \
+	&& cp $WORK_DIR/crawlab.conf /etc/nginx/conf.d \
+	&& service nginx reload \
+	&& ln -s /usr/bin/pip3 /usr/local/bin/pip \
+	&& ln -s /usr/bin/python3 /usr/local/bin/python
 
 # install mongodb
-RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4
-RUN echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-4.0.list
-RUN apt-get update
-RUN apt-get install -y mongodb-org
-RUN mongod >> /var/log/mongod.log 2>&1 &
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4 \ 
+	&& echo "deb [ arch=amd64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | tee /etc/apt/sources.list.d/mongodb-org-4.0.list \
+	&& apt-get update \
+	&& apt-get install -y mongodb-org \
+	&& mongod >> /var/log/mongod.log 2>&1 &
 
 # install python
-RUN apt-get install -y python python3 python3-pip 
-RUN ln -s /usr/bin/pip3 /usr/local/bin/pip
-RUN ln -s /usr/bin/python3 /usr/local/bin/python
 #RUN git clone git://github.com/yyuu/pyenv.git ~/.pyenv
 #ENV PYENV_ROOT "$HOME/.pyenv"
 #ENV PATH "$PYENV_ROOT/bin:$PATH"
@@ -44,23 +46,14 @@ ENV NODE_PATH $NVM_DIR/versions/node/v$NODE_VERSION/lib/node_modules
 ENV PATH $NVM_DIR/versions/node/v$NODE_VERSION/bin:$PATH
 
 # install frontend
-RUN npm install -g yarn pm2 --registry=https://registry.npm.taobao.org
-RUN cd /opt/crawlab/frontend && yarn install --registry=https://registry.npm.taobao.org
-
-# install nginx 
-RUN apt-get install -y nginx
-
-# install redis
-RUN apt-get install -y redis-server
-RUN service redis-server start
+RUN npm install -g yarn pm2 --registry=https://registry.npm.taobao.org \
+	&& cd /opt/crawlab/frontend \
+	&& yarn install --registry=https://registry.npm.taobao.org
 
 # install backend
-RUN pip install -U setuptools -i https://pypi.tuna.tsinghua.edu.cn/simple
-RUN pip install -r /opt/crawlab/crawlab/requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
+RUN pip install -U setuptools -i https://pypi.tuna.tsinghua.edu.cn/simple \
+	&& pip install -r /opt/crawlab/crawlab/requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
 
-# nginx config & start frontend
-RUN cp $WORK_DIR/crawlab.conf /etc/nginx/conf.d
-RUN service nginx reload
 
 # start backend
 EXPOSE 8080