Enable panel preview in mybinder

binder/postBuild

@@ -1,4 +1,2 @@
-#!/bin/bash
-
-# Import the workspace into JupyterLab
-#jupyter lab workspaces import binder/workspace.json
+panel build panel
+jupyter serverextension enable panel.io.jupyter_server_extension

binder/start

@@ -0,0 +1,5 @@
+#!/bin/bash
+export BOKEH_ALLOW_WS_ORIGIN=*
+sleep 3
+jupyter trust notebooks/*.ipynb
+exec "$@"