Update Dockerfile

Dockerfile

@@ -1,26 +1,29 @@
 # Use the official lightweight Python image.
-# https://hub.docker.com/_/python
 FROM python:3.9-slim
 
 # Set the working directory to /app
 WORKDIR /app
 
-# Create a non-root user with an explicit UID and adds permission to access the /app folder
-# For more info, please refer to https://aka.ms/vscode-docker-python-configure-containers
+# Create a non-root user with an explicit UID
 RUN adduser -u 1000 --disabled-password --gecos "" appuser && chown -R appuser /app
 USER appuser
 
-# Copy the requirements file into the container
+# CRITICAL FIX: Add the user's local bin directory to PATH so the shell can find 'uvicorn'
+ENV PATH="/home/appuser/.local/bin:$PATH"
+
+# Copy the requirements file
 COPY --chown=appuser requirements.txt .
 
 # Install the dependencies
+# Note: As a non-root user, pip will default to --user install, putting files in ~/.local
 RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
 # Copy the rest of the application code
 COPY --chown=appuser . .
 
-# Expose the port that Hugging Face Spaces expects (7860)
+# Expose the port
 EXPOSE 7860
 
-# Command to run the application using uvicorn
-CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]
+# Command to run the application
+# Using 'python -m uvicorn' is safer than just 'uvicorn' to ensure it uses the installed module
+CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]