samplebot.js

const restify = require('restify');
const builder = require('botbuilder');
const os = require('os');

const server = restify.createServer();
server.listen(process.env.port || process.env.PORT || 3978, function () {
   console.log('%s listening to %s', server.name, server.url); 
});

var connector = new builder.ChatConnector({
    appId: process.env.MICROSOFT_APP_ID,
    appPassword: process.env.MICROSOFT_APP_PASSWORD
});

server.post('/api/messages', connector.listen());

const bot = new builder.UniversalBot(connector, function (session) {
    session.send("You said: %s, machine that responds is %s", session.message.text, os.hostname);
});