Flattened RUN statements in Dockerfile.

Author: pilwon

Dockerfile

@@ -8,10 +8,11 @@
 FROM dockerfile/ubuntu
 
 # Install Nginx.
-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 \
+  add-apt-repository -y ppa:nginx/stable && \
+  apt-get update && \
+  apt-get install -y nginx && \
+  echo "\ndaemon off;" >> /etc/nginx/nginx.conf
 
 # Define mountable directories.
 VOLUME ["/data", "/etc/nginx/sites-enabled", "/var/log/nginx"]