feature: Dynamically enabling Dbux

Especially, when using a bundler or, genrally, a build pipeline, enabling/disabling Dbux can be a pain.
* → When its not needed, running things with Dbux can slow down certain development tasks considerably.
* → Dev should be able to easily toggle Dbux on only when needed, then turn it off again.

TODO

* [ ] Make it easier to toggle Dbux.
* Maybe dynamically re-load config?
* Maybe provide an easy way to build two versions in parallel, with dynamic prioritization?
* E.g.: frontend application is built twice; once with and once without Dbux. Runs on two different ports.