How to use #traefik as a reverse-proxy for something hosted on... host.
First, free up 80 and 443 ports. For example, make host nginx listen on smth like 81.
Next, get your docker0 subnet. 172.17.0.1/16 for me.Get your traefik default `ip route`. 172.18.0.1 for me.
ufw allow from 172.18.0.1/24 to any 81
Get your traefik file provider up and running.As a service, define a load balancer to http://172.17.0.1:83/
typo at the load balancer, port 81 should be there.
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