Resolve "Add RPC method to list peers" (!316)

* fix: Docker config + documentation

* Revert "review: test code, not dead code"

This reverts commit 922df964.

* review: test code, not dead code

* review: iodiomatic usage of stream

* review: add --public-endpoints option

* review: spawn_handle + BoundedVec

* fix: metadata.scale

* fix: warnings

* fix: node was no more starting

* clippy (again)

* clippy

* feat(#97): add RPC endpoint + gossip protocol for peerings