fix: add diagnostic logging and copy notebooks to /data on startup

start_server.sh

@@ -1,11 +1,51 @@
 #!/bin/bash
-JUPYTER_TOKEN="${JUPYTER_TOKEN:=huggingface}"
+set -e  # Exit on error
+
+echo "===== Starting FBMC Chronos-2 JupyterLab Space ====="
+echo "Timestamp: $(date)"
+echo "User: $(whoami)"
+echo "Working directory: $(pwd)"
 
+# Set environment
+JUPYTER_TOKEN="${JUPYTER_TOKEN:=huggingface}"
 NOTEBOOK_DIR="/data"
 
-jupyter labextension disable "@jupyterlab/apputils-extension:announcements"
+echo "JUPYTER_TOKEN: ${JUPYTER_TOKEN:0:10}..."
+echo "NOTEBOOK_DIR: $NOTEBOOK_DIR"
+
+# Check if jupyter-lab is installed
+echo "Checking jupyter-lab installation..."
+which jupyter-lab || echo "WARNING: jupyter-lab not found in PATH"
+jupyter-lab --version || echo "WARNING: Cannot get jupyter-lab version"
+
+# Check Python environment
+echo "Python version: $(python --version)"
+echo "Python path: $(which python)"
+
+# List /data directory
+echo "Contents of /data directory:"
+ls -lah /data || echo "WARNING: Cannot list /data"
+
+# Copy notebooks from /home/user/app to /data if they don't exist
+echo "Ensuring notebooks are in /data..."
+if [ -f /home/user/app/inference_smoke_test.ipynb ]; then
+    echo "Copying notebooks from /home/user/app to /data..."
+    cp -v /home/user/app/*.ipynb /data/ 2>/dev/null || true
+    if [ -d /home/user/app/src ]; then
+        cp -rv /home/user/app/src /data/ 2>/dev/null || true
+    fi
+fi
+
+echo "Final /data contents:"
+ls -lah /data
+
+# Disable announcements
+echo "Disabling JupyterLab announcements..."
+jupyter labextension disable "@jupyterlab/apputils-extension:announcements" || echo "WARNING: Could not disable announcements"
 
-jupyter-lab \
+# Start JupyterLab
+echo "Starting JupyterLab on port 7860..."
+exec jupyter-lab \
     --ip 0.0.0.0 \
     --port 7860 \
     --no-browser \