Here's the patch, sorry for the bad manners.
--- entrypoint.sh.orig 2019-01-16 09:38:18.760830943 -0300 +++ entrypoint.sh 2019-01-15 16:43:26.000000000 -0300 @@ -28,7 +28,7 @@ # Using --threads to have multi-threaded single-process worker if [ ! -z ${PGADMIN_ENABLE_TLS} ]; then - exec gunicorn --bind [::]:${PGADMIN_LISTEN_PORT:-443} -w 1 --threads ${GUNICORN_THREADS:-25} --access-logfile - --keyfile /certs/server.key --certfile /certs/server.cert run_pgadmin:app + exec gunicorn --bind 0.0.0.0:${PGADMIN_LISTEN_PORT:-443} -w 1 --threads ${GUNICORN_THREADS:-25} --access-logfile - --keyfile /certs/server.key --certfile /certs/server.cert run_pgadmin:app else - exec gunicorn --bind [::]:${PGADMIN_LISTEN_PORT:-80} -w 1 --threads ${GUNICORN_THREADS:-25} --access-logfile - run_pgadmin:app + exec gunicorn --bind 0.0.0.0:${PGADMIN_LISTEN_PORT:-80} -w 1 --threads ${GUNICORN_THREADS:-25} --access-logfile - run_pgadmin:app fi