Create a bokeh example

```bash
# serve app at a specific port, allow websockets
bokeh serve app.ipynb --port 8051 --allow-websocket-origin=colorado.posit.co

# then you do have to manually get the port/proxy address
$ echo $(/usr/lib/rstudio-server/bin/rserver-url -l 8051)
https://colorado.posit.co/rstudio/s/8cf1a3c9ab5a77c58f451/p/5547d5d1/
```