[porthole] Mention TCP limitation in README

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soup 2025-04-12 00:34:26 -04:00
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`porthole` is a simple application to expose services running on your localhost
via some other host.
**NOTE**: Currently, only TCP-based services are supported.
## Quickstart
To use `porthole`, you need to have the server running on a host that is exposed
to the WWW.