Fix: run uvicorn as a python module

Dockerfile

@@ -7,16 +7,15 @@ WORKDIR /home/user/app
 # 2. Install UV
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
 
-# 3. Copy files (as root to ensure they transfer correctly)
-COPY . .
+# 3. Copy files
+COPY --chown=user . .
 
-# 4. Install dependencies and the workspace
-# We install fastapi and uvicorn explicitly to the workspace environment
+# 4. Install dependencies
+# We install fastapi and uvicorn into the workspace environment
 RUN /usr/local/bin/uv sync --all-extras && \
     /usr/local/bin/uv add fastapi uvicorn
 
-# 5. Fix Permissions
-# This prevents the 'Permission Denied' os error 13 on the .venv
+# 5. Fix Permissions (Crucial for Hugging Face)
 RUN chown -R user:user /home/user/app
 
 # 6. Switch to non-root user
@@ -24,10 +23,10 @@ USER user
 
 # 7. Environment Setup
 ENV PORT=7860
-# This allows the inner 'duckdb_loader' folder to be recognized as a package
+# This allows 'import duckdb_loader' to work from the app root
 ENV PYTHONPATH=/home/user/app/duckdb_loader
 EXPOSE 7860
 
-# 8. Start the API
-# We point to: [folder].[subfolder].[file]:[app_variable]
-CMD ["/usr/local/bin/uv", "run", "python", "-m", "uvicorn", "duckdb_loader.main:app", "--host", "0.0.0.0", "--port", "7860"]
+# 8. THE CMD: Navigate the double-nest
+# Package (duckdb_loader) -> Sub-Package (duckdb_loader) -> Module (main) -> Object (app)
+CMD ["/usr/local/bin/uv", "run", "python", "-m", "uvicorn", "duckdb_loader.duckdb_loader.main:app", "--host", "0.0.0.0", "--port", "7860"]