Joke API: Builds Joke List

.gitignore

# Files to Ignore
node_modules

jokes.txt

{"jokes":[]}

package.json

{
  "name": "joke-api",
  "version": "0.0.1",
  "description": "",
  "main": "server.js",
  "scripts": {
    "start": "node server.js"
  },
  "dependencies": {
    "body-parser": "^1.14.1",
    "express": "^4.13.3",
    "nodemon": "^1.8.1"
  },
  "engines": {
    "node": "5.2.x"
  },
  "author": "Hank Couture",
  "license": "MIT"
}

server.js

var http = require("http");
var fs = require('fs');
var bodyParser = require('body-parser');
var express = require('express');
var app = express();
app.use(bodyParser.json());

app.set('port', 3000);

app.get('/jokes', function(req, res) {
	fs.readFile('./jokes.txt', function(err, jokes) {
		if (err) throw err;
		res.setHeader('Content-Type', "application/json");
		res.end(jokes);
	})
})

app.post('/jokes', function(req, res) {
	var joke = req.body;
	console.log('joke:', joke);
	fs.readFile('./jokes.txt', function(err, jokes) {
		if (err) throw err;
		var jokeList = JSON.parse(jokes)
		jokeList.jokes.push(joke);
		console.log('jokelist:', jokeList);
		jokeList = JSON.stringify(jokeList);
		fs.writeFile('./jokes.txt', jokeList, function(err){
			if (err) throw err;
			res.end("that was a success bro. Next time, try to be funnier");
		})
	})	
})

app.listen(app.get('port'), function(){
	console.log('Node app is running on port', app.get('port'));
});

Great job! It's very good that you're thinking about Content-Type. As a tip, express should set it to application/json for you when you res.send an object.