Add cache directories with proper permissions for model downloads

Dockerfile

@@ -5,6 +5,12 @@ WORKDIR /app
 # Install ffmpeg for audio processing
 RUN apt-get update && apt-get install -y ffmpeg && apt-get clean
 
+# Create a cache directory with proper permissions
+RUN mkdir -p /app/.cache && chmod 777 /app/.cache
+ENV TRANSFORMERS_CACHE=/app/.cache
+ENV HF_HOME=/app/.cache
+ENV SENTENCE_TRANSFORMERS_HOME=/app/.cache
+
 # Install dependencies
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt