tunnel to avalanchego node

tunnel.js

#!/usr/bin/env node

# this script creates a tunnel from localhost:9650 to your avalanchego node
const fs = require('fs');
const readFileSync = fs.readFileSync;
// npm install -g tunnel-ssh 
const tunnelSsh = require("tunnel-ssh");

async function main() {
  if (process.argv.length < 3) {
    console.error('Usage: tunnel x.x.x.x');
    process.exit(1);
  }
  const ipaddress = process.argv[2];

  const tunnelConfig = {
    username: "username",
    host: ipaddress,
    dstHost: ipaddress,
    dstPort: 9650,
    localPort: 9650,
    privateKey: readFileSync(`${process.env["HOME"]}/.ssh/your_key`),
    keepAlive: true,
  };

  console.log(
    `Starting tunnel for ${tunnelConfig.hostname} on port ${tunnelConfig.localPort}`
  );
  const t = tunnelSsh(tunnelConfig, function(error, server) {
    if (error) {
      console.error("Tunnel error: ", error);
      process.exit(1);
    }
  });
  t.on("error", (err) => {
    console.error("Something bad happened:", err);
    process.exit(1);
  });
}

main().catch((e) => {
  console.error(e);
  process.exit(1);
});