Update Dockerfile

Dockerfile

@@ -10,6 +10,8 @@ RUN sudo apt-get update -y
 RUN sudo apt-get upgrade -y
 # Install any needed packages specified in requirements.txt
 RUN python -m pip install --upgrade pip
+RUN pip install gradio langchain
+
 RUN pip install transformers[torch] -y
 RUN pip install -r requirements.txt