Allow p2p to run on all networks except Mainnet

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 75.63%. Comparing base (8ca9307) to head (2b12db6). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
node/node.go	0.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2241 +/- ## ========================================== - Coverage 75.70% 75.63% -0.08% ========================================== Files 104 104 Lines 11102 11102 ========================================== - Hits 8405 8397 -8 - Misses 2067 2073 +6 - Partials 630 632 +2 ```

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