Run ./up.sh for the example. The WireGuard keys are freshly generated, so it requires some
steps to connect client and server. The advantage is that the script showcases more stuff.
If successful, it will have done a HTTP download on the WireGuard server from a HTTP server provided "through" the WireGuard client.
See docker-compose.yml for some more words about the three different containers and their
configuration.
NOTE: docker-compose prior v2.x is apparently unable to do anything when the container
defined in network_mode: doesn't already exist. In that case, you have to comment out that
line, run docker-compose up -d wg-client, remove the comment and continue. This is currently
incompatible with using the up.sh script.
Furthermore, recreating the wg-client container requires also recreating the dependent
nginx container, as the network stack is bound to a particular container, not an abstract
name. Unfortunately, you can't define this kind of dependency in docker-compose, so it must
be done manually.