This should be a separate step for logic reasons.

clear webdriver versions before install right one because webdriver can not select the right one from time to time

like here:
```
npx webdriver-manager status
chromedriver versions available: 84.0.4147.105 [last], 87.0.4280.66
```

It is erroring out otherwise.

And use it for the prod build.

This includes running unit tests when building.
The docker compose setup uses only the first stage of the image building 
process, which uses node as server. The next step, for production, uses 
nginx as server software.

By running "docker-compose -f docker/docker-compose.yml up" the frontend 
and a mock backend can be run. This enables unit and e2e testing.

There is also a Dockerfile for producing a production ready container 
using nginx as base.

The specs.yml file serves as an API definition for the backend mock 
container. This needs to be updated (i.e. copied over) manually whenever 
the backend API changes. This workflow may be improved in the future.