Update Dockerfile

Dockerfile

@@ -73,9 +73,13 @@ RUN mkdir /data
 # Python packages and application files
 #######################################
 
+# Install Python packages from requirements.txt (ensure jupyterlab is included here or install explicitly)
 RUN --mount=target=requirements.txt,source=requirements.txt \
     pip install --no-cache-dir --upgrade -r requirements.txt
 
+# Explicitly install JupyterLab if not already in requirements.txt
+RUN pip install --no-cache-dir jupyterlab
+
 # Copy the current directory contents into /app
 COPY . /app