Split dashboard and NGINX reverse proxy
At the moment the dashboard-container is acting as the reverse proxy. This creates an unnecessary dependency on dashboard running. Also it prevents us from using alternative reverse proxys.
It would be better to have the dashboard-container be a simple nginx only serving the files (analogous to the dashboard-clock image) and add an additional reverse-proxy to aura-web. In a default-setup I'd set up a nginx like it is configured in the current dashboard-image.
It might be good to document usage in a different reverse Proxy.