Make clearer what libraries are known to work with dashboard server at the moment in a one-click fashion. (They're in the README, but a bit buried.)
Explain the three-ish ways that libraries use to get JS to the web page of a notebook and how they apply in the dashboard server: a) cell output, b) bundled, c) pre-webpacked.
Explain what a user / dashboard server provider needs to do to add new support in each of the cases (roughly: a) nothing, b) writing a bundler / creating a manual bundle, c) submitting a PR here or forking)
References: jupyter-incubator/dashboards#275, jupyter-incubator/dashboards#277, jupyter-incubator/dashboards_server#300, jupyter-incubator/dashboards_server#301, #188, #135
/cc @DTAIEB