web ui

[cad]

We need a primitive Web UI for both users and admins.

Admin interface would be capable of doing nearly all the tasks that can be done via CLI.

User interface would enable users to log in, download their .ovpn configurations and maybe download OpenVPN binaries based on the device, OS and architecture detected when they are logged in to the Web UI.

Also, another matter is Port Sharing. It would be nice to use the same port for both HTTP and OpenVPN at the same time.

One approach could be to implement such logic that if the VPN and Web UI is configured to use the same port, it would change the actual Web UI port to something else and use port-share option implicitly to redirect non-VPN traffic to that port.

Also for the web interface and rest API, it would be nice to have auto-renewing let's encrypt.

Notes:

• http://www.vpntutorials.com/tutorials/openvpn-sharing-a-port-with-a-webserver-on-port-80-443/
• https://unix.stackexchange.com/questions/306046/use-openvpn-on-tcp-443-without-it-interfering-with-my-web-server