angular code will be moved to domains as the domains start to emerge.
This is described here: https://github.com/openfoodfoundation/openfoodnetwork/wiki/Tech-Doc:-How-OFN-is-organized-in-Domains-using-Rails-Engines#technical-structure
and already done here: https://github.com/openfoodfoundation/openfoodnetwork/tree/master/engines/web/app/assets/javascripts/web
we can then migrate one domain at a time to a diff tech or version of angular.