update to ubuntu:trusty & remove apt-get upgrade

Author: tifayuki

Dockerfile

@@ -1,9 +1,10 @@
-FROM ubuntu:quantal
+FROM ubuntu:trusty
 MAINTAINER Fernando Mayo <[email protected]>
 
 RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv C7917B12
 RUN echo "deb http://ppa.launchpad.net/chris-lea/redis-server/ubuntu quantal main" >> /etc/apt/sources.list
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y upgrade && DEBIAN_FRONTEND=noninteractive apt-get install -y redis-server pwgen
+RUN apt-get update 
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y redis-server pwgen
 
 # Add scripts
 ADD run.sh /run.sh