I host a couple of web services like Nextcloud and Overleaf instances (Docker) and I use nginx as a reverse proxy. What would be the benefit of using Traefik instead? Traefik can handle things such as TLS certificates automatically, but that seems a rather weak reason to move away from a robust and modular setup where each component complies with the Unix philosophy or doing one thing well.
I use nginx as Gateway (Reverse Proxy) and have several VMs with services deployed using Docker Stack. Traefik acts as reverse proxy on the VMs. Main benefit IMHO: configuring services/routing using docker labes and because they run in dedicated networks, no need to expose any port (Internet -> Nginx -> Traefik -[> Service ] ; wheras [ ] indicates a docker overlay network.
Yeah, I don't use Traefik I use Caddy with https://github.com/lucaslorentz/caddy-docker-proxy to achieve configurations by labels, but that is really a killer feature. All the config to set up an app can go in a docker-compose file and I just have one point of configuration for it. Editing or deleting it doesn't involve editing configurations in 3-4 places.
