Upon start, the webapp prints its own initialization message twice, e.g.:
```
timira ➜ swh-web-ui git:(master) bin/swh-web-ui
SWH Web UI available at http://127.0.0.1:6543/
debug: True
SWH Web UI available at http://127.0.0.1:6543/
debug: True
```
That's weird. Is the app being initialized twice?
Also, why are we printing ourselves the app location, given Flask knows how to do that itself (when running in debug mode, at least)?