https://community.freepbx.org/t/no-audio-pjsip/65068
https://community.asterisk.org/t/asterisk-in-docker-bad-one-way-audio-quality/79646
https://computingforgeeks.com/how-to-run-asterisk-in-docker-container/
https://voxlink.ru/kb/asterisk-configuration/pjsip-after-nat/