pin streamlit version, add --upgrade to pip install

Dockerfile

@@ -9,7 +9,7 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
 
 RUN pip install --user --no-cache-dir --upgrade pip
 COPY ./requirements.txt /home/appuser/requirements.txt
-RUN pip install --user --no-cache-dir  -r /home/appuser/requirements.txt
+RUN pip install --user --no-cache-dir  --upgrade -r /home/appuser/requirements.txt
 
 COPY ./langchain-streamlit-demo/* /home/appuser/langchain-streamlit-demo/
 

requirements.txt

@@ -2,6 +2,6 @@ anthropic
 langchain
 langsmith
 openai
-streamlit
+streamlit==1.26.0
 streamlit-feedback
 tiktoken