Revert "Added default assets_path to registry"

This reverts commit 2acfc83c5fcf1e3b5fce6f58081ae7d37ad4f2a2.
Revert "Server serves assets"

This reverts commit bd597e1b927c2e0109dafa4b86e80e5f1dc86045.
Revert "The /-endpoint serves a dashboard.html file"

This reverts commit 4ae94d3c345264a8fb3a6f1101d3b98923ea0a18.