Dockerfile starter for CentOS 6

Dockerfile

FROM centos:6.10

# Switch to using the Vault repos. The upstream image refers to package mirrors
# that no longer exist for this old release of CentOS. 
RUN sed -i \
        -e '/^mirrorlist/d' \
        -e 's|^#baseurl=.*$releasever/|baseurl=http://vault.centos.org/6.10/|' \
        /etc/yum.repos.d/CentOS-Base.repo

# Update all base image packages
RUN yum -y update \
 && yum -y clean all \
 && rm -rf /var/cache

# Install yum package dependencies
RUN yum -y install \
        CUSTOMIZE HERE \
 && yum -y clean all \
 && rm -rf /var/cache