fix port default

site/src/server.js

@@ -4,12 +4,12 @@ import sirv from 'sirv';
 import * as sapper from '@sapper/server';
 import { sanitize_user, authenticate } from './utils/auth';
 
-const { PORT } = process.env;
-
-if (!PORT) {
-	throw new Error(`PORT "${PORT}" specified. Check your .env file.`);
+if (!process.env.PORT) {
+	process.env.PORT = 3000;
 }
 
+const { PORT } = process.env;
+
 const app = polka({
 	onError: (err, req, res) => {
 		const error = err.message || err;