POST returns 404 Not Found - angularjs

Question

I've recently started using MEAN Stack to create a basic application, so im a total beginner, I set up my controllers and everything and I want to post, however it returns api/user not found, can someone pinpoint the problem and help me out? Thanks.
Server.js:
var app = require ('./app/app');
var signupController = require ('./server/signup-controller');
app.post('api/users', signupController.create);
app.listen('8080', function(){
console.log('[OK] => HTTP Server listening on http://localhost:8080');
require('./app/db').init('mongodb://localhost:27017/shopialmedia' );
});
Server side Controller (signup-controller.js):
module.exports.create = function (req, res) {
console.log(req.body);
}
Client Side Controller (signup-controller.js):
app.controller('signupController', ['$scope', '$resource', function ($scope, $resource) {
var User = $resource('/api/users');
$scope.createUser = function () {
var user = new User();
user.email = $scope.userEmail;
user.password = $scope.userPass;
user.firstName = $scope.userFName;
user.lastName = $scope.userLName;
user.age = $scope.userAge;
user.$save(function (result){
$scope.user.push(result);
$scope.userEmail = '';
$scope.userPass = '';
$scope.userFName = '';
$scope.userLName = '';
$scope.userAge = '';
});
}
}]);
My module :
var app = angular.module('signupApp', ['ngResource']);
My app.js :
var express = require ('express');
var app = express();
app.use(express.static('public'));
require('./routes')(app);
module.exports = app;
When I go to run the application on my web page and submit the information, it returns api/user 404 Not found any suggestions on what to do, I'd greatly appreciate it. As I said im a beginner so please take that into consideration.

Answer 1

Server.js Add:
app.get('api/users', signupController.list);
signup-controller.js Add:
mongoose = require('mongoose'),
User = mongoose.model('User');
module.exports.list = function(req, res){
var searcher = req.query || {};
User.find(searcher)
.sort('-created')
.exec(function (err, users) {
if (err) {
return res.status(400).send({
message: errorHandler.getErrorMessage(err)
});
}
res.json(users);
});
};
Obviously, you'll also have to connect to mongoose with a file probably called main.js then you'll need a UserModel.js (or equivalent) where you can define the attributes of your user etc using the mongoose Schema...
I mean you're missing a lot if you want something a little simpler to start you can just do:
module.exports.list = function(req, res){
var users = [];
res.json(users);
};
Also think you need this and this is also nicer formatting:
var router = express.Router();
router.route('/')
.get(users.list)
.get(users.create)
app.use('/api/users', router);
Not sure what this is supposed to do or what ./routes is: require('./routes')(app);