diff --git a/Dockerfile b/Dockerfile
index 9efcb9b..1f1fb47 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -50,6 +50,8 @@ COPY --from=build --chown=app:www-data /home/app/web/.bundle ./.bundle
 COPY --chown=app:www-data ./docs ./public/docs
 
 USER root
+ENV RAILS_MASTER_KEY
+ENV RAILS_ENV production
 RUN install -m 640 -o root -g root ./monit.conf /etc/monit.d/puma.conf
 RUN monit -t
 VOLUME "/srv/http/data"