error when trying to connect to my websitename(Centos)

Question

I'm trying to set up very basic http server on my hosting(centos)

The script is:

#!/usr/bin/env python3.8

from http.server import HTTPServer, BaseHTTPRequestHandler

 class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):

    def do_GET(self):
        self.send_response(200)
        self.end_headers()
        self.wfile.write(b'Hello, world!')


httpd = HTTPServer(('0.0.0.0', 8080), SimpleHTTPRequestHandler)
httpd.serve_forever()

Everything looks normal: ss -t -a -n

LISTEN 0 5 0.0.0.0:8080 0.0.0.0:*

But when im trying to get to my websitename:8080 nothing is happening and i get connection timed out response. I've been googling about http, networking, even centos for a few days, got lots of usefull information but i still have no idea what's going on here. Ty for your time!