Update Dockerfile

Dockerfile

@@ -26,7 +26,10 @@ COPY ./main.py /code/main.py
 RUN pip install --upgrade pip
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-# Expose the port used by Uvicorn / Hugging Face Spaces
+# Pre-download the sentence-transformers model
+RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('all-MiniLM-L6-v2')"
+
+# Expose the port used by Uvicorn
 EXPOSE 7860
 
 # Start the app