Microservice to bring 2FA to self hosted PDSes

Fix default host issue #40

Merged willdot.net
targeting main from willdot.net/pds-gatekeeper:fix-host-defaukt
Merged opened by and assigned to willdot.net
targeting main from willdot.net/pds-gatekeeper:fix-host-defaukt
Commits 1

use 0.0.0.0 as default host