Make letstest docker ip more robust
Make letstest docker ip more robust

lmcro/letsencrypt,stweil/letsencrypt,bsmr-misc-forks/letsencrypt,lmcro/letsencrypt,stweil/letsencrypt,jtl999/certbot,jsha/letsencrypt,jsha/letsencrypt,jtl999/certbot,bsmr-misc-forks/letsencrypt,letsencrypt/letsencrypt,letsencrypt/letsencrypt