use chromium instead of chrome in docker

Dockerfile

 FROM node:7
 
-RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
-  && sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
+# RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
+#   && sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
 
 RUN apt-get update -q && apt-get install -qy \
       apt-utils \
       chromium \
-      google-chrome-stable \
       vim \
       xvfb \
     && rm -rf /tmp/*
+      # google-chrome-stable \
 
 WORKDIR /wechaty
 
 COPY package.json .
 RUN npm set progress=false \
-  && npm install ts-node typescript -g \
   && npm install --loglevel warn \
   && rm -fr /tmp/*
+  # && npm install ts-node typescript -g \
+
 COPY . .
 RUN npm link