Users may have difficulty setting up a test system to run the validation script described in #1415. To resolve this, a docker script should be written which dockerhub will use to build a docker image which contains the following: * Pulp 2.8.0 or pre-release 2.8.0 and all the plugins from #1415 * An empty mongodb instance * a server.conf configured to connect to that mongodb Also some simple mongodb instructions should be written showing users an example of how to export data from their production pulp_database and restore it to the mongodb running in this docker environment. Having this script will allow us to re-publish a newer version of the in-development pulp with little effort. This task is to both write the script and have dockerhub build it. Then test it. Once it's ready, a blog post needs to be written describing to users how they can use this and why they would want to as a pre-upgrade step.