get_root_domain
module for parsing a domain to determine the public suffix
RUN apt-get update && \
apt-get install -y libdomain-publicsuffix-perl
RUN apt-get update && \
apt-get install -y libdomain-publicsuffix-perl
RUN apt-get update && \
apt-get install -y libdomain-publicsuffix-perl
RUN apt-get update && \
apt-get install -y libdomain-publicsuffix-perl