Spaces: switch to Python 3.10 and preinstall PyYAML/Cython

Dockerfile

@@ -23,5 +23,4 @@ ENV PORT=7860 PYTHONUNBUFFERED=1
 EXPOSE 7860
 
 # Gunicorn loads Flask app from run.py
-CMD ["gunicorn", "run:app", "--workers", "2", "--threads", "8", "--timeout", "120", "--bind", "0.0.0.0:${PORT}"]
-
+CMD ["sh", "-c", "exec gunicorn run:app --workers 2 --threads 8 --timeout 120 --bind 0.0.0.0:${PORT:-7860}"]