Get build working for server

This PR will add 3 seperate build scripts in the package.json for each namespace.

It also moves the `devDependencies` to `dependencies` - which IMO isn't great but is something we can fix later on.

Do note, when pushing to the server you'll need to check two things:

package.json scripts.postinstall runs the correct build (`npm run build:moz` for example)
Profile sets the correct NAMESPACE ENV variable