Update Dockerfile

Dockerfile

@@ -36,9 +36,15 @@ RUN pip install --no-cache-dir notebook ipykernel papermill
 #   datacreation.ipynb:  beautifulsoup4 pandas matplotlib seaborn numpy textblob
 #   pythonanalysis.ipynb: pandas matplotlib seaborn numpy textblob faker transformers vaderSentiment
 # Most are already in requirements.txt; add the extras:
-RUN pip install --no-cache-dir textblob faker transformers
+#RUN pip install --no-cache-dir textblob faker transformers
+
+#RUN python -m ipykernel install --user --name python3 --display-name "Python 3"
+# Notebook execution deps
+RUN pip install --no-cache-dir jupyter nbclient jupyter_client ipykernel papermill
+
+# Register python3 kernel in this environment (NOT per-user)
+RUN python -m ipykernel install --sys-prefix --name python3 --display-name "Python 3"
 
-RUN python -m ipykernel install --user --name python3 --display-name "Python 3"
 
 # R deps for notebook execution via papermill (IRkernel)
 RUN R -e "install.packages('IRkernel', repos='https://cloud.r-project.org/')"