Hello Node.js

.gitignore

.DS_Store
node_modules/
*.log

app.js

var http = require('http');
var port = process.env.PORT || 3000;

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.end("Hello World\n");
});

// Listen on port 3000, IP defaults to 127.0.0.1
server.listen(port);

// Put a friendly message on the terminal
console.log("Server running at http://127.0.0.1:" + port + "/");

package.json

{
  "name": "4ed6534c5d15c471fe29",
  "version": "1.0.0",
  "main": "app.js"
}

Procfile

web: node app.js