Nodejs Express server not working

So I was wondering if anyone could help me, I've hit a roadblock in my project where I am trying to set up a local server with nodejs and express. I have tried everything from google, stack overflow, and a myriad of blog articles on the topic - but no dice. I have tried writing different routes for each file, and that worked for the static JavaScript and Css files, but not for the images I have uploaded to my site. Also, writing each route for each file gets clunky and I don't think its the best way to serve static files. Here is my code for my app.js file: var express = require('express');

var app = express();

app.use(express.static('CSS'));

app.get('/HTML/index.html',function(req,res) { res.sendFile(__dirname + '/HTML/index.html'); });

app.listen(7888, function() { console.log("If this does not work soon I will kill a small animal"); });

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I have tried using the middleware for all of my files at once by creating and putting into a public folder, and then when that didn't work I tried calling the middleware several times caling different directories. No matter what I do, I always get a 404 in the broswer.