Add pyaudioop fallback, force rebuild

Dockerfile

@@ -2,7 +2,11 @@ FROM python:3.12-slim
 
 WORKDIR /home/user/app
 
-RUN pip install --no-cache-dir gradio==4.44.0 httpx>=0.28.0
+# Install audioop fallback for safety
+RUN pip install --no-cache-dir \
+    gradio==4.44.0 \
+    httpx>=0.28.0 \
+    pyaudioop
 
 COPY app.py .
 
@@ -11,5 +15,6 @@ USER user
 
 EXPOSE 7860
 ENV GRADIO_SERVER_NAME="0.0.0.0"
+ENV GRADIO_SERVER_PORT="7860"
 
 CMD ["python", "app.py"]