Refactor Dockerfile to use a Python entrypoint script for asset downloading and Streamlit startup; add new entrypoint.py script.

Dockerfile

@@ -15,13 +15,8 @@ COPY . .
 
 ENV PYTHONPATH=/app/app
 
-# Create entrypoint script
-RUN echo '#!/bin/bash\n\
-python3 -m app.scripts.download_assets\n\
-exec streamlit run app/main.py --server.port=8501 --server.address=0.0.0.0\n\
-' > /entrypoint.sh && chmod +x /entrypoint.sh
 
 EXPOSE 8501
 HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["python3", "-m", "app.scripts.entrypoint"]

app/scripts/entrypoint.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+"""
+Entrypoint script that downloads assets and starts Streamlit.
+"""
+import sys
+import subprocess
+
+def main():
+    # Download assets first
+    print("Downloading assets...")
+    try:
+        from app.scripts.download_assets import main as download_main
+        download_main()
+    except Exception as e:
+        print(f"Warning: Asset download failed: {e}")
+        print("Continuing anyway...")
+    
+    # Start Streamlit (this replaces the Python process)
+    print("Starting Streamlit...")
+    sys.exit(subprocess.run([
+        "streamlit", "run", 
+        "app/main.py",
+        "--server.port=8501",
+        "--server.address=0.0.0.0"
+    ]).returncode)
+
+if __name__ == "__main__":
+    main()