update docker file

Dockerfile

@@ -21,6 +21,9 @@ RUN apt-get update && \
 # 2️⃣  Set work directory
 WORKDIR /app
 
+# 2️⃣.b Ensure /data cache directory exists and is writable (HF Spaces persistent volume)
+RUN mkdir -p /data/.cache/huggingface && chmod -R 777 /data/.cache
+
 # 3️⃣  Copy & install Python deps first (layer cache)
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt