Script for installing and updating renamed applications

[lorenyu]

Right now installing the template hardcodes the app name to infra/app, but if we want to support multiple apps we need to templatize this and support the ability to install the infra/app into a new app folder and to be able to update the infra/app folders when updating the infra template.

Priority

High: Not a blocker for projects, but enough projects are using the platform and have renamed the app that it would make it much easier for projects to update (and encourage them to update the infra template) if we did this