Added rm -rf /var/lib/apt/lists/*

Author: pilwon

Dockerfile

@@ -12,6 +12,7 @@ RUN \
   add-apt-repository -y ppa:nginx/stable && \
   apt-get update && \
   apt-get install -y nginx && \
+  rm -rf /var/lib/apt/lists/* && \
   echo "\ndaemon off;" >> /etc/nginx/nginx.conf && \
   chown -R www-data:www-data /var/lib/nginx