Allow to run all development tasks from single dev environment

[nbeloglazov]

The goal is to allow developers to run dev tasks (running server, running unit tests, running browser tests) from the same environment removing the need to switch between environments that leads to long waiting times (full recompilation). Additionally it will help ensure that environments don't diverge too much, making debugging tests easier.

Doc: https://docs.google.com/document/d/1ckZmKo_7IXf3W4YgbG465OMsv6iCaGirf_zDP_aU7gg/edit