Framework: Rework how configuration is built

[alisterscott]

Originally raised by @nb

Instead of having to call make build with a separate environment variable to build our bundles for each environment, it would be nice if we could create one build and then maybe use something like envify to remove dead code to create the bundles for each environment. We should also do the same when it comes to the source map. This should reduce the docker image build time considerably.

Some envify info: reduxjs/redux#1029

[stale]

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