You don't have to. You create a container which runs openvpn to connect to your vpn provider, and also hosts an ssh daemon. The ssh daemon receives incoming SOCKS5 connections from a firefox portable browser, which has been configured to use the proxy (your Docker openvpn-container) for browsing and DNS resolution, and pipes it through the VPN tunnel.
So you have that one browser just to surf imgur. if that's your thing. And you could also use Firefox on Android (maybe also iOS) with those proxy settings (a secondary Firefox browser, like the beta version).
So you get very high control about what you are using the VPN for, you don't just pipe your entire OS's network traffic through the VPN.