set flask environment to production

Dockerfile

@@ -17,7 +17,7 @@ WORKDIR /
 ADD setup.py /
 RUN pip install -e .
 ENV FLASK_APP import_api_app
-#ENV FLASK_ENV development
+ENV FLASK_ENV production
 EXPOSE 5000
 ENTRYPOINT ["python"]
 CMD ["/import_api_app/main.py"]