Remove default_server in default site config.

Author: pilwon

Dockerfile

@@ -12,6 +12,7 @@ RUN add-apt-repository -y ppa:nginx/stable
 RUN apt-get update
 RUN apt-get install -y nginx
 RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf
+RUN sed -i 's/80 default_server/80/' /etc/nginx/sites-available/default
 
 # Define mountable directories.
 VOLUME ["/data", "/etc/nginx/sites-enabled", "/var/log/nginx"]