chore(rootfs/Dockerfile): update to latest base image

mboersma · mboersma · commit 58535323b101 · 2016-08-19T15:27:21.000-06:00
Has pre-created man page directories to work around an issue
with "apt-get install postgresql-client," for one example.
diff --git a/rootfs/Dockerfile b/rootfs/Dockerfile
@@ -1,4 +1,4 @@
-FROM quay.io/deis/base:0.3.0
+FROM quay.io/deis/base:0.3.1
 
 RUN adduser --system \
 	--shell /bin/bash \
