Reducing disk footprint for Ubuntu/Debian images

Only install English locales and do not install documentation.

http://wiki.ubuntu.com/ReducingDiskFootprint

Change-Id: I129cd7cc8777112acb751c600feb8900c0c2a461

docker/base/Dockerfile.j2

@@ -190,6 +190,9 @@ RUN cat /tmp/kolla_bashrc >> /etc/bash.bashrc
 # This will prevent questions from being asked during the install
 ENV DEBIAN_FRONTEND noninteractive
 
+# Reducing disk footprint
+COPY dpkg_reducing_disk_footprint /etc/dpkg/dpkg.cfg.d/dpkg_reducing_disk_footprint
+
 # Need apt-transport-https BEFORE we replace sources.list or apt-get update wont work!
 RUN apt-get update && apt-get -y install --no-install-recommends apt-transport-https ca-certificates
 

docker/base/dpkg_reducing_disk_footprint

+path-exclude /usr/share/doc/*
+path-include /usr/share/doc/*/copyright
+path-exclude /usr/share/man/*
+path-exclude /usr/share/groff/*
+path-exclude /usr/share/info/*
+path-exclude /usr/share/lintian/*
+path-exclude /usr/share/linda/*
+path-exclude /usr/share/locale/*
+path-include /usr/share/locale/en*

releasenotes/notes/dpkg-reducing-disk-footprint-2a6b0056d57bd1de.yaml

+---
+other:
+ - Reducing disk footprint for Ubuntu/Debian images
+   by only installing English locales and no
+   documentation files.