Add WebRTC private to public example

[achingbrain]

We have an example for WebRTC private to private (e.g. two browser peers behind NATs) where we use a Circuit Relay server to exchange SDP messages to establish a direct connection between the two nodes.

As of @libp2p/webrtc@5.1.0 support has landed for WebRTC-Direct listeners in Node.js, so it would be great to add a private to public example where a Node.js listener is created and a browser dials it without needing a relay.

[Dhruv-Varshney-developer]

Hello @achingbrain, I am working on this. Could you please assign it to me so others don’t duplicate the effort? I’ll create a PR with the necessary changes. Thanks!

[Nkovaturient]

@achingbrain , Hey there!
I have setup a pvt and public node so far using @libp2p/webrtc@5.1.0 as desired and adequate configurations. However I keep running into this error:-

node index.js
Failed to create public node: no valid addresses were provided for transports [@libp2p/webrtc-direct]

ig, there is some issue in transport configurations and public-peer listening addresses
kindly review it.

[NiKrause]

i confirm it works @Nkovaturient ! thank you!