I need change everywhere https://meet.jit.si to my https://meet.myserver.com ?
The iOS part is correct. On Android you can set it here: jitsi-meet/MainActivity.java at 543f273792a6e7a0e277db2c017ad8d0c3108635 · jitsi/jitsi-meet · GitHub
thank you, what about web ?
On web you just need to visit your server’s URL, I don’t think there is anything you need to change.
I plan use only backend from https://meet.myserver.com and have my web frontend with some tweaks on mysite.com so i cant just redirect to https://meet.myserver.com
now i run my web frontend locally (https://127.0.0.1:8080/) but connected to https://meet.jit.si backend so somehow i am able to do what i describe upper
trying to figure out 
maybe use config.js in my frontend from https://meet.myserver.com?