Multiple containers and port conflicts

I'm running a few docker containers on a VPS. So far no conflicts but what I'm wondering is how can I add containers that will request the same ports that are already in use. For example ports 80, 443, 3306 are pretty commonly used. So if I have for instance a WordPress container using port 80, how can I add another container running for instance nextcloud which also is going to want port 80.

Can something like Traeffik be used in a case like this?

submitted by /u/airdogvan
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Source: Reddit