Set Handlebars as the default template language in the main app file.
var compression = require("compression");
var express     = require("express");
var handlebars  = require("express-handlebars");

//	Initialize Express
var app = express();

//  Treat "/foo" and "/Foo" as different URLs
app.set("case sensitive routing", true);

//  Treat "/foo" and "/foo/" as different URLs
app.set("strict routing", true);

//  Default to port 3000
app.set("port", process.env.PORT || 3000);

//  Compress all requests
app.use(compression());

//  Set Handlebars as the default template language
app.engine("handlebars", handlebars({defaultLayout: "main"}));
app.set("view engine", "handlebars");

//  Handle 404 errors
app.use(function(req, res) {
    res.type("text/plain");
    res.status(404);
    res.send("404 - Not Found");
});

//  Handle 500 errors
app.use(function(err, req, res, next) {
    console.error(err.stack);
    res.type("text/plain");
    res.status(500);
    res.send("500 - Server Error");
});

app.listen(app.get("port"), function() {
    console.log("Express started on http://localhost:" + app.get("port") + "; press Ctrl-C to terminate.");
});

var compression = require("compression");
var express     = require("express");

//  Initialize Express
var app = express();

//  Treat "/foo" and "/Foo" as different URLs
app.set("case sensitive routing", true);

//  Treat "/foo" and "/foo/" as different URLs
app.set("strict routing", true);

//  Default to port 3000
app.set("port", process.env.PORT || 3000);

//  Compress all requests
app.use(compression());

//  Handle 404 errors
app.use(function(req, res) {
    res.type("text/plain");
    res.status(404);
    res.send("404 - Not Found");
});

//  Handle 500 errors
app.use(function(err, req, res, next) {
    console.error(err.stack);
    res.type("text/plain");
    res.status(500);
    res.send("500 - Server Error");
});

app.listen(app.get("port"), function() {
    console.log("Express started on http://localhost:" + app.get("port") + "; press Ctrl-C to terminate.");
});
