Update Dockerfile

Dockerfile

@@ -4,7 +4,7 @@ FROM centos:centos7
 ARG registry=docker.io
 ARG maintainer=tier
 ARG imagename=mariadb
-ARG version=10
+ARG version=10.2
 
 MAINTAINER $maintainer
 LABEL Vendor="Internet2"
@@ -21,6 +21,8 @@ COPY ./conf/mariadb.repo /etc/yum.repos.d/
 # Install base deps
 RUN yum -y install --setopt=tsflags=nodocs MariaDB-server bind-utils net-tools pwgen psmisc hostname vim
 
+RUN yum -y update
+
 # Add starters and installers
 ADD ./container_files /opt
 RUN rm -rf /etc/my.cnf