add reranker (#679)

python/reranker/bge-reranker-base/Dockerfile

@@ -0,0 +1,10 @@
+FROM pytorch/pytorch:2.0.1-cuda11.7-cudnn8-runtime
+
+# please download the model from https://huggingface.co/BAAI/bge-reranker-base and put it in the same directory as Dockerfile
+COPY ./bge-reranker-base ./bge-reranker-base
+
+COPY app.py Dockerfile requirement.txt .
+
+RUN python3 -m pip install -r requirement.txt
+
+ENTRYPOINT python3 app.py