Hosted application available via continuous delivery somewhere

[jharmison-redhat]

Users should be able to access the configuration app via a link from https://faros.dev that doesn't require that they already have a cluster running, enabling them to generate configurations and save them for loading into Project Faros' data directory (potentially via farosctl config import, but that doesn't apply to this repo). This means two things:

• Releases should be continuously delivered to some hosting service (Heroku?)
• Releases should be available per schema version, so users can generate a config yaml for an older deployment of Project Faros if needed. Schema versions should clearly map to supported cluster-manager and farosctl shim versions.