Update Dockerfile

Dockerfile

@@ -2,15 +2,18 @@
 # This file tells Hugging Face Spaces how to build and run the Flask application.
 
 # 1. Start with a standard Python 3.9 base image.
-FROM python:3.13-slim
+FROM python:3.9-slim
 
 # 2. Set the working directory inside the container.
 WORKDIR /code
 
-# --- FIX ---
-# 3. Set the HF_HOME environment variable to a writable directory.
-# This prevents the "Permission denied: '/.cache'" error.
+# 3. Set environment variables.
+# This prevents the /.cache permission error.
 ENV HF_HOME="/tmp/.cache/huggingface"
+# --- FIX ---
+# This explicitly tells Flask which file contains the application.
+# This is a more robust way to ensure routes are found.
+ENV FLASK_APP=app.py
 
 # 4. Copy the requirements file into the working directory.
 COPY ./requirements.txt /code/requirements.txt
@@ -24,5 +27,6 @@ COPY ./ /code/
 # 7. Expose the port that the application will run on.
 EXPOSE 7860
 
-# 8. Define the command to run the application using Gunicorn.
-CMD ["gunicorn", "--bind", "0.0.0.0:7860", "app:app"]
+# 8. Define the command to run the application using Flask's built-in server for debugging.
+# The FLASK_APP environment variable set above will ensure this command finds the right file.
+CMD ["flask", "run", "--host=0.0.0.0", "--port=7860"]