ref(Dockerfiles): use ubuntu-debootstrap:14.04 as base image

Author: mboersma

Dockerfile

@@ -1,9 +1,9 @@
-FROM ubuntu:14.04
+FROM ubuntu-debootstrap:14.04
 
 ENV DEBIAN_FRONTEND noninteractive
 
 # install common packages
-RUN apt-get update && apt-get install -y curl
+RUN apt-get update && apt-get install -y curl net-tools sudo
 
 # install etcdctl
 RUN curl -sSL -o /usr/local/bin/etcdctl https://s3-us-west-2.amazonaws.com/opdemand/etcdctl-v0.4.6 \

README.md

@@ -4,7 +4,7 @@ A RESTful API server for use in the [Deis](http://deis.io) open source PaaS.
 
 
 This Docker image is based on the official
-[ubuntu:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).