Move jupyterlite config to docs directory so it can be found.

Apparently this config file was just being ignored because it was in the wrong directory.

Author: jasongrout

.gitignore

@@ -20,6 +20,7 @@ js/jupyter-leaflet-*.tgz
 # Documentation data files
 docs/*.csv
 docs/*.json
+!docs/jupyterlite_config.json
 docs/*.nc
 docs/test.wkt