Changes...

data/Dockerfiles/postfix/Dockerfile

@@ -1,14 +1,10 @@
 From ubuntu:xenial
 MAINTAINER Andre Peters <andre.peters@servercow.de>
 
-# Set noninteractive mode for apt-get
 ENV DEBIAN_FRONTEND noninteractive
 
-# Update
 RUN apt-get update
 
-# Start editing
-# Install package here for cache
 RUN apt-get -y install supervisor \
 	postfix \
 	sasl2-bin \
@@ -26,5 +22,4 @@ RUN useradd -g vmail -u 5000 vmail -d /var/vmail
 
 EXPOSE 588
 
-# Run
 CMD /usr/bin/supervisord -c /etc/supervisor/supervisord.conf