Fix: Copy final magic-pdf.json to /root

Dockerfile

@@ -64,11 +64,20 @@ RUN mkdir -p $HOME/app/output/images && \
 USER user
 
 # Run model download script and configure magic-pdf for CUDA
+# This should update $HOME/magic-pdf.json with correct cache paths
 RUN . /opt/mineru_venv/bin/activate && \
     python3 $HOME/app/download_models.py && \
     cp $HOME/app/magic-pdf.json $HOME/magic-pdf.json && \
     sed -i 's|"device": "cpu"|"device": "cuda"|g' $HOME/magic-pdf.json
 
+# Switch back to root temporarily to copy the final config to /root
+USER root
+RUN cp $HOME/magic-pdf.json /root/magic-pdf.json && \
+    chown root:root /root/magic-pdf.json
+
+# Switch back to the non-root user for running the app and copying files
+USER user
+
 # Copy the rest of the application code as the user
 COPY --chown=user . .