Deploy Flask to Linux Server

Hello Guys, How can I deploy a Flask Server to Linux? I've a VPS on Ionos and am currently trying to get everything running. • https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xvii-deployment-on-linux • https://www.youtube.com/watch?v=vfZgHX5ttsY&t=132s I am following this tutorial , setting all environment varialbes, but if i want to connect to the ipv4, a Plesk default page appears. On my Server Plesk isn't installed. I had it previously installed, but renewed the virtual server, so there is only ubuntu on it. In my Quest to finding the solution i stumbled upon some information I don't know how to set into action. https://caddy.community/t/plesk-onyx-rocket-chat-caddy/2867/4 https://stackoverflow.com/questions/77452900/issues-configuring-reverse-proxy-nginx-caddy-with-plesk-and-cloudflare What can I do at this point? or is it easier to just get heroku or an other provider? Thanks for the time you took reading this article. I really apreatiate it. I all wish you Merry Christmas. Best regards Simon.