Fix dockerfile

Author: ayufan

dockerfiles/Dockerfile.build

@@ -68,7 +68,7 @@ COPY --from=deb_env /release/ /release/
 # Install base packages
 RUN export DEBIAN_FRONTEND=noninteractive && \
   apt-get -y update && \
-  apt install -y runit ssmtp cron &&
+  apt install -y runit ssmtp cron && \
   /release/install
 
 # Add default configs