disable flask warning

docker/Dockerfile.base

@@ -9,6 +9,7 @@ COPY --from=ffmpeg /usr/local /usr/local/
 
 COPY --from=wheels /wheels/. /wheels/
 
+ENV FLASK_ENV=development
 ENV DEBIAN_FRONTEND=noninteractive
 # Install packages for apt repo
 RUN apt-get -qq update && apt-get -qq install --no-install-recommends -y \