Installation with ngxing proxymanager - certificates

What type of hardware are you using: Virtual machine
What YunoHost version are you running: 12.1
How are you able to access your server: The webadmin
SSH
Direct access via physical keyboard/screen
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: vm in proxmox

Describe your issue

Hello,
I setup ngxing proxymanager in Proxmox in one vm and yunohost in an other one.
Ngxing proxymanager manage certificates very well.
I didn’t create certificate in Yunohost, it works but not in local network for users.
Should I create certificate in yunohost as well ?
Thank you !

Share relevant logs or error messages

no certificate for this site