Update Dockerfile

Dockerfile

@@ -1,8 +1,9 @@
 # Use the official Python 3.11.9 image
 FROM python:3.11.9
 
-# Install jq
+# Install some dependencies
 RUN apt-get update && apt-get install -y jq
+RUN apt-get update && apt-get install -y tree
 
 # Set up a new user named "user" with user ID 1000
 RUN useradd -m -u 1000 user
@@ -40,5 +41,9 @@ RUN git clone https://github.com/VOICEVOX/voicevox_engine.git voicevox_engine
 # Install requirements.txt
 RUN pip install --requirement voicevox_engine/requirements.txt
 
+# List the file structure for debugging
+RUN echo "=== File Structure in /home/user/app ===" && \
+    tree -a /home/user/app
+
 # Start the FastAPI app on port 7860, the default port expected by Spaces
 CMD ["python", "voicevox_engine/run.py", "--voicelib_dir", "voicevox_core", "--host", "0.0.0.0", "--port", "7860", "--cors_policy_mode", "all"]