Port numbers for `cuprated`
## What
Which port numbers will `cuprated` use by default?

## The standard
`monerod` uses the following ports as convention/defaults:

| Port  | Purpose |
|-------|---------|
| [18080](https://github.com/monero-project/monero/blob/a1dc85c5373a30f14aaf7dcfdd95f5a7375d3623/src/cryptonote_config.h#L226) | P2P traffic
| [18081](https://github.com/monero-project/monero/blob/a1dc85c5373a30f14aaf7dcfdd95f5a7375d3623/src/cryptonote_config.h#L227) | Non-restricted RPC
| [18082](https://github.com/monero-project/monero/blob/a1dc85c5373a30f14aaf7dcfdd95f5a7375d3623/src/cryptonote_config.h#L228) (but sometimes on 18083) | ZMQ
| 18083 (convention) | Anonymity network
| 18089 (convention) | Restricted RPC

[2808* is used for for testnet](https://github.com/monero-project/monero/blob/a1dc85c5373a30f14aaf7dcfdd95f5a7375d3623/src/cryptonote_config.h#L269), [3808* is used for stagenet](https://github.com/monero-project/monero/blob/a1dc85c5373a30f14aaf7dcfdd95f5a7375d3623/src/cryptonote_config.h#L284).

## Considerations
- 4808* is tempting but may clash with `monerod` in the future
- [Should be above 1024](https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers)
- Should not be a common test port, i.e. 8000, 8080, 7777
- Should not be a port used by another common program, i.e. 9001, 8333