https://medium.com/@gurayy/set-up-a-vpn-server-with-docker-in-5-minutes-a66184882c45
I have some addition, we must created blank “vars” file in openvpn-data folder for easyRSA work !
https://passepartoutvpn.app/faq/#the-vpn-fails-with-auth-failed-or-immediately-disconnects-with-encryption-failed