mh-centos8: minor fixes

diff --git a/misc/docker/centos-8-amd64/Dockerfile b/misc/docker/centos-8-amd64/Dockerfile
index ed1081ed4714ad399c13d8ed8d710dc6a9d7bcae..2454870f042ffedd08908f5a9954ca0a469eb6c1 100644 (file)
--- a/misc/docker/centos-8-amd64/Dockerfile
+++ b/misc/docker/centos-8-amd64/Dockerfile
@@ -1,5 +1,5 @@
-FROM centos:8
-RUN yum -y upgrade
+FROM centos:latest
+RUN yum -y update
 RUN yum -y install \
        autoconf \
        flex \