Doesnt show up Website correctly

Hello, I have a Raspberry Pi Zero 2 W with a Display. I want to host a Website in the localhost and then show it on the Display. To make the Website run, I gotta run 2 different commands (node server.js and http-server) and when I make this using:

bash
#!/bin/bash
sudo gnome-terminal --working-directory=/home/kiski/SpotifyDashboard/ -- http-server
sudo gnome-terminal --working-directory=/home/kiski/SpotifyDashboard/ -- node server.js
sleep 2
chromium-browser --app=http://127.0.0.1:8080/

It just shows this Page: (view attatched pic) But weirdly it still shows the correct icon. How can I fix this? OS: Raspberry Pi OS