I am trying to install the MPW Prechecks tool from github. When I run

sh build-docker.sh

it fails with the following error. Has anyone seen this issue?

bryce@ubuntu:~/open_mpw_precheck/dependencies$ sh build-docker.sh
dir created
Sending build context to Docker daemon  14.34kB
Step 1/23 : FROM centos:centos7 as build
 ---> 8652b9f0cb4c
Step 2/23 : RUN yum -y install centos-release-scl &&     yum -y install devtoolset-8 devtoolset-8-libatomic-devel
 ---> Running in 91f18fe89b14
Loaded plugins: fastestmirror, ovl
Determining fastest mirrors
Could not retrieve mirrorlist <http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container> error was
14: curl#6 - "Could not resolve host: <http://mirrorlist.centos.org|mirrorlist.centos.org>; Unknown error"


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64
The command '/bin/sh -c yum -y install centos-release-scl &&     yum -y install devtoolset-8 devtoolset-8-libatomic-devel' returned a non-zero code: 1