Create node example directory

examples/node/test.js

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+var fs = require('fs')
+
+var zt = require('./libzt')
+
+var running = zt.running()
+console.log('running', running)
+
+var earth = '8056c2e21c000001'
+var listenPort = 1234
+
+zt.simpleStart('./tmp/' + earth, earth)
+
+var deviceId = zt.getDeviceId()
+console.log('device id', deviceId)
+
+var addr = zt.getIpV4Address(earth).split('/')[0]
+console.log('ip a', addr)
+
+var socket = zt.socket()
+console.log('socket', socket)
+
+var bindPort = zt.bindPort(socket, addr, listenPort)
+console.log('bind', bindPort)
+
+var listen = zt.listen(socket)
+console.log('listen', listen)
+
+console.log()
+console.log('ready')
+console.log(`run this in another terminal:\n\tnc ${addr} ${listenPort}`)
+console.log(`then type something`)
+console.log()
+
+var fd = zt.accept(socket)
+
+fd = fs.createReadStream(null, { fd: fd })
+fd.pipe(process.stdout)
+
+// Start reading from stdin so we don't exit.
+process.stdin.resume()
+// lib.ZT.stop()