Express / Node / Cloud9 - issues serving static files

I'm having an issue serving a simple static html file with Express on a Cloud9 server.

My file structure is simply:

/workspace
    /public

Screenshot from c9.io here

And here's my code, I get a Cannot GET/ (screenshot) when previewing in the browser.

static.js (located in the C9 workspace):

var http = require('http');
var path = require('path');
var express = require('express');

var app = express();
app.use(express.static(path.join(__dirname, '/public')));

http.createServer(app).listen(8080);

static.html (located in /public):

<!doctype html>
<html>
    <body>
        <p>Hello World!</p>
    </body>
</html>

I know the server's listening on the right port, because the preview works when I write directly to the response stream using Express, like this:

app.use(function(request, response) {
    response.end("Hello world!\n");
});
http.createServer(app).listen(8080);

Apologies for the simplicity of the request, I just pared everything down to understand the fundamental reason I'm seeing "Cannot GET/".

Thanks for your help.

Solution

renaming the file from static.html to index.html will work