Fix gosec warning about ListenAndServe without timeout

[kaancfidan]

gosec warning:

[/github/workspace/main.go:47] - G114 (CWE): Use of net/http serve function that has no support for setting timeouts (Confidence: HIGH, Severity: MEDIUM)
46:
47: err = http.ListenAndServe(f.listenAddress, nil)
48: log.Fatal(err)