make slcs image derived from minimal-node

from centos:6

MAINTAINER Earth System Grid Federation <esgf-devel@lists.llnl.gov>

ARG ESGF_IMAGES_HUB=esgfhub

ARG ESGF_VERSION=devel

FROM $ESGF_IMAGES_HUB/esgf-minimal-node:$ESGF_VERSION

# install GPG keys

RUN rpm --import http://download.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-6

RUN rpm --import http://vault.centos.org/RPM-GPG-KEY-CentOS-6

RUN yum history new # That fix the warning 'Warning: RPMDB altered outside of yum'

MAINTAINER Earth System Grid Federation <esgf-devel@lists.llnl.gov>

RUN yum clean all && \

    yum -y update && \

    yum -y install wget \

RUN yum -y install wget \

    git \

    sudo \

    epel-release \