Docker Build Fails when Downloading Postgres

[dc-steph]

When attempting to build the image from the Dockerfile, I receive a error when it tries to download PostgreSQL.

[ 6/19] RUN yum -y install https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm: #9 1.540 Loaded plugins: fastestmirror, ovl #9 7.431 Cannot open: https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm. Skipping. #9 7.432 Error: Nothing to do

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Any suggestions would be GREATLY appreciated.