Node v17.1.0 resolves localhost differently

[yasushisakai]

While the README recommends node's version to be 14, I tried 17.1.0 (that was installed in my system) and npm start did not work, giving the following error:

FetchError: request to http://localhost:8899/ failed, reason: connect ECONNREFUSED ::1:8899
    at ClientRequest.<anonymous> (/home/yasushi/code/solana/example-helloworld/node_modules/node-fetch/lib/index.js:1461:11)

This comes from the node resolving localhost to IPv6's ::1, not 127.0.0.1. This is totally from upstream, and does nothing to do with this example, but I suggest that it should be written stronger in the README.md that other versions of node may not work...

The current LTS 16.13.1 did work.

others have pointed out this behavior:
okTurtles/group-income#1108

[CalebEverett]

This is failing even with node LTS 16.13.1

found 0 vulnerabilities
v16.13.1

...

Let's say hello to a Solana account...
FetchError: request to http://localhost:8899/ failed, reason: connect ECONNREFUSED ::1:8899
    at ClientRequest.<anonymous> (/home/runner/work/sol-hello2/sol-hello2/node_modules/node-fetch/lib/index.js:1461:11)
    at ClientRequest.emit (node:events:390:28)
    at ClientRequest.emit (node:domain:475:12)
    at Socket.socketErrorListener (node:_http_client:442:9)
    at Socket.emit (node:events:390:28)
    at Socket.emit (node:domain:475:12)
    at emitErrorNT (node:internal/streams/destroy:164:8)
    at emitErrorCloseNT (node:internal/streams/destroy:129:3)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  type: 'system',
  errno: 'ECONNREFUSED',
  code: 'ECONNREFUSED'
}

[jstarry]

Could one of you open a PR to fix this? Thanks for reporting!

[CalebEverett]

this seemed like the minimal fix e58ed51