app.js

var bodyParser  = require("body-parser"),
    express     = require("express"),
    app         = express(),
    Cosmic      = require("cosmicjs");

var api = Cosmic();
var bucket = api.bucket({
    slug: "favorite-book",
    read_key: "QxlWYVywWwJu94x9vVp3DJFt11OqLIUJRBBp0i4FyqbpvtOOhp"
});

app.set("view engine", "ejs");
app.use(express.static("public"));
app.use(bodyParser.urlencoded({extended: true}));

app.get("/", function(req,res){
    res.redirect("/books");
});

app.get("/books", function(req,res){
    bucket.getObjects({
    }).then(books => {
        res.render("index", {books: books});
    });
});

app.get("/books/:slug", function(req,res){
    bucket.getObject({
        slug: req.params.slug
    }).then(book => {
        res.render("show", {book: book});
    });
});

app.listen(process.env.PORT || 5000);