docs: add wait-on workaround advice (Node.js 18) (#813)

* docs: add  wait-on workaround advice (Node.js 18)

* add backticks for wait-on

Author: MikeMcC399

README.md

@@ -734,6 +734,14 @@ See [example-wait-on.yml](.github/workflows/example-wait-on.yml) workflow file.
 
 If this action times out waiting for the server to respond, please see [Debugging](#debugging) section in this README file.
 
+#### `wait-on` with Node.js 18+
+
+Under Node.js version 18 and later, `wait-on` may fail to recognize that a `localhost` server is running. This affects development web servers which do not listen on both IPv4 and IPv6 network stacks.
+
+- Check your server documentation to see if it can be started using `0.0.0.0` (all addresses) and use this if available. If this option is not available or does not resolve the issue then carry on to the next steps:
+- If the action log shows that `wait-on` is failing to connect to `127.0.0.1`, replace `localhost` by `[::1]` (the IPv6 loopback address)
+- If the action log shows that `wait-on` is failing to connect to `::1`, replace `localhost` by `127.0.0.1` (the IPv4 loopback address)
+
 ### Custom install command
 
 If you want to overwrite the install command