Pre-commit hook to filter-out output cells

.hooks/pre-commit

+#!/bin/sh
+
+for U in "$(git diff --cached --name-only)"; do
+    # skip files staged for deletion
+    test -e "$U" || continue
+    if [[ "$U" =~ .ipynb$ ]]; then
+        jupyter nbconvert --debug --ClearOutputPreprocessor.enabled=True --inplace "$U"
+    fi
+    git add "$U"
+done

binder/requirements.txt

 black
 isort
+jupyter_contrib_nbextensions
 jupyterlab
 jupyterlab-code-formatter
 jupyterlab-execute-time