Trying to get Koa-pug working

Application.mjs.fail

import http2 from "http2";
import fs from "fs";
import { promisify } from "util";
import Koa from "koa";
import Pug from "koa-pug"
import Router from "koa-router";
import serve from "koa-static";
import mount from "koa-mount";

const PORT = process.env.PORT || "3000";
const CERT_FILE = process.env.CERT_FILE
const KEY_FILE = process.env.KEY_FILE

export class Application{
	constructor(){
        this.app = new Koa();
        this.hosted = Application.getHostedApp();
        this.vueApp = Application.getVueApp();
        this.uiApp = Application.getUIApp();
        this.app.use(mount(this.hosted));
        this.app.use(mount("/vue", this.vueApp));
        this.app.use(mount("/ui", this.uiApp));

        this.options = {
            key: fs.readFileSync(KEY_FILE),
            cert: fs.readFileSync(CERT_FILE)
        }
        this.server = http2.createSecureServer(this.options, this.app.callback());
        this.server.on("error", (err) => console.error(err));
	}
	static getUIApp(){
        const app = new Koa();
    	app.use(serve("./node_modules/@jrg/main-ui-private/dist"));
    	return app;
    }
	static getVueApp(){
	    const app = new Koa();
	    app.use(serve("./node_modules/vue/dist"));
	    return app;
	}
	// TODO: Make own class
	static getHostedApp(){
	    const app = new Koa();
	    const pug = new Pug({
            viewPath: './src/views'
        });
        pug.use(app);
        const router = new Router();
        router.get("/", function(ctx){
            ctx.render('index');
        })
        router.get("/test",function(ctx){
            ctx.body = "Test"
        });
        app.use(router.routes());
        app.use(router.allowedMethods());
        return app;
	}
	start(){
	    const listenAsync = promisify(this.server.listen.bind( this.server ));
	    return listenAsync(PORT);
	}
}

Application.mjs.works

import http2 from "http2";
import fs from "fs";
import { promisify } from "util";
import Koa from "koa";
import Pug from "koa-pug"
import Router from "koa-router";
import serve from "koa-static";
import mount from "koa-mount";

const PORT = process.env.PORT || "3000";
const CERT_FILE = process.env.CERT_FILE // TODO: Not working || "~/Code/certs/jackiergleason.cert"
const KEY_FILE = process.env.KEY_FILE // TODO: Not working || "~/Code/certs/jackiergleason.key"
export class Application{
	constructor(){
            this.hosted = Application.getHostedApp();

            this.options = {
                key: fs.readFileSync(KEY_FILE),
                cert: fs.readFileSync(CERT_FILE)
            }
            this.server = http2.createSecureServer(this.options, this.hosted.callback());
            this.server.on("error", (err) => console.error(err));
	}
	// TODO: Make own class
	static getHostedApp(){
	    const app = new Koa();
	    const pug = new Pug({
                viewPath: './src/views'
            });
            pug.use(app);
            const router = new Router();
            router.get("/", function(ctx){
                ctx.render('index');
            })
            router.get("/test",function(ctx){
                ctx.body = "Test"
            });
            app.use(router.routes());
            app.use(router.allowedMethods());
            return app;
	}
	start(){
	    const listenAsync = promisify(this.server.listen.bind( this.server ));
	    return listenAsync(PORT);
	}
}