Update Dockerfile

Dockerfile

@@ -14,7 +14,12 @@ RUN apt-get update && apt-get install -y \
 # Upgrade pip
 RUN python3 -m pip install --upgrade pip
 
-# Copy requirements and install Python deps
+# Set cache directories to writable /app/.cache (fixes PermissionError)
+ENV TRANSFORMERS_CACHE=/app/.cache/transformers
+ENV HF_HOME=/app/.cache/huggingface
+RUN mkdir -p /app/.cache/transformers /app/.cache/huggingface
+
+# Copy requirements and install Python deps (no cache to slim image)
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
@@ -24,5 +29,9 @@ COPY app.py .
 # Expose port (HF Spaces default)
 EXPOSE 7860
 
+# Health check (optional, for Spaces monitoring)
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:7860/health || exit 1
+
 # Run the FastAPI app with Uvicorn (workers=1 for single GPU, host=0.0.0.0 for external access)
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]