Update Dockerfile

Dockerfile

@@ -25,14 +25,13 @@ WORKDIR $HOME/app
 COPY --chown=user requirements.txt $HOME/app
 
 RUN pip install --no-cache-dir -r requirements.txt 
-RUN mkdir -p ~/.streamlit/
-RUN echo "\
+RUN mkdir -p ~/.streamlit && \
+    echo "\
 [server]\n\
 headless = true\n\
-port = $PORT\n\
+port = \$PORT\n\
 enableXsrfProtection=false\n\
 enableCORS = false\n\
-\n\
 " > ~/.streamlit/config.toml
 
 # Copy the rest of the application codeDocQA