Update _config.yml

_config.yml

@@ -76,12 +76,12 @@ launch_buttons:
   notebook_interface: jupyterlab # The interface interactive links will activate ["classic", "jupyterlab"]
   binderhub_url: "https://mybinder.org" # The URL of the BinderHub (e.g., https://mybinder.org)
   jupyterhub_url: "https://hub.econ-ark.org/" # The URL of the JupyterHub (e.g., https://datahub.berkeley.edu)
-  thebe: false # Add a thebe button to pages (requires the repository to run on Binder)
-  colab_url: "" # The URL of Google Colab (https://colab.research.google.com)
+  thebe: true # Add a thebe button to pages (requires the repository to run on Binder)
+  colab_url: "https://colab.research.google.com" # The URL of Google Colab (https://colab.research.google.com)
 
 repository:
   url: https://github.com/econ-ark/DemARK # The URL to your book's repository
-  path_to_book: . # A path to your book's folder, relative to the repository root.
+  path_to_book: # A path to your book's folder, relative to the repository root.
   branch: master # Which branch of the repository should be used when creating links
 
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