Add pip isntall langchain_community in Dockerfile

Dockerfile

@@ -36,7 +36,7 @@ COPY --from=build-image ${MODEL} ${MODEL}
 COPY ./main.py ./
 COPY ./start_server.sh ./
 # COPY ./index.html ./
-RUN pip install --no-cache-dir open-text-embeddings[server] && \
+RUN pip install --no-cache-dir open-text-embeddings[server] langchain_community && \
     chmod +x ./start_server.sh
 
 # Expose a port for the server