Merge branch 'demo-notebook' into collapsible-headers

packages/toc/.dockerignore

@@ -1 +0,0 @@
-node_modules

packages/toc/README.md

@@ -45,7 +45,7 @@ This will automatically recompile `@jupyterlab/toc` upon changes, and JupyterLab
 <!-- links -->
 
 [badge-binder]: https://mybinder.org/badge_logo.svg
-[binder]: https://mybinder.org/v2/gh/kgryte/jupyterlab-toc/collapsible-headers?urlpath=lab%2Ftree%2Fnotebooks%2Fdemo.ipynb
+[binder]: https://mybinder.org/v2/gh/jupyterlab/jupyterlab-toc/master?urlpath=lab%2Ftree%2Fnotebooks%2Fdemo.ipynb
 [python-data-science-handbook]: https://github.com/jakevdp/PythonDataScienceHandbook
 
 <!-- /.links -->