Dockerfile: create /data for model cache

Dockerfile

@@ -28,6 +28,9 @@ RUN pip install --upgrade pip && pip install -r requirements.txt
 # App code
 COPY . .
 
+# Ensure writable persistent dir for downloaded models
+RUN mkdir -p /data
+
 # Expose default port for HF Docker Spaces
 EXPOSE 7860
 HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=10 \