I hope the project can add openvpn(or other VPN) to solve the issues of RTP behind Docker Nat

[samuel-lau-hk]

Now I can use IAX only , but SIP should be better. There are some solution to add huge range of UDP forward . It seems too complicate and hard to manage. If the alpine have vpn , it can bypass the NAT and firewall issues. I tried to add openvpn in front of asterisk . It worked perfectly. But I hope this two functions can work in same container. It can reduce the machine loading.