index.js 파일로 서버 실행 시키기 ( http 요청 받기 )

index.js
var server = require("./server");

server.start();

server.js
var http = require("http");
function start() {
function onRequest( request, response ) {
console.log("Request received");
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("HelloWorld");
response.end();
}
http.createServer(onRequest).listen(8888);
console.log("server has started");
}
exports.start = start;