Add empty file to avoid logrotate error (due to default configuration of the package)

Dockerfile

@@ -135,6 +135,8 @@
 COPY nginx.conf /etc/nginx/nginx.conf
 COPY nginx.vh.default.conf /etc/nginx/conf.d/default.conf
 COPY nginx /etc/logrotate.d/nginx
+# avoid logrotate error for missing file
+CMD touch /var/log/messages
 
 EXPOSE 80 443