Issue title: Investigate possible improvements to build time.
 Issue body: ### Expected behaviour
We should try to decrease build time of a production, dev, and test build goals. 

* Possible bottleneck scenarios: 
- webpack version
- webpack config merges/handlings
- moving of assets
- babel version
- output of logs

### Actual behaviour
Prod, dev, and test goals should take a reasonable time

### Steps to reproduce

 Comments: 
 Comment 0: Cleaning up - Closing issues that were open for a long time without any update. We can re-open if needed.
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