Deploying these containers with traefik - a follow-up question

[amca01]

According to an answer nearly two years ago:

"Hey, you only need to point traefik to port 80 of seafile-caddy, it'll do the rest."

That sounds very simple; currently in my traefik.yml file I have

entrypoints:
  web:
    address ":80"

I have a number of containerized services currently working with traefik (adminer, portainer, kanboard, and before I wrecked it: nextcloud). Will changing that port to seafile caddy ruin those containers? I'd be happy to change from traefik to something else for managing certificates, but it took me long enough (and a lot of help!) to get traefik working. And I don't have a lot of time to learn a new system: I'm looking for something plug-and-play-ish. Anyway, any help on how to manage seafile and caddy with traefik would be very helpful! Many thanks.