21-serviceworker
This adds the service worker and has been tested before. I left the merge out previously to handle installation of the service worker better. But right now I need this to be merged as all the installation will be handled in the Nomad project and I will make it work there.
Added requirement for aiofiles in order to serve static files from NORTH api, needs to be double checked if it is really needed.
Closes #21 (closed)