[BUG] - Unable to access REST API without serving web front end

[KieranCoppins]

UE Version:
UE 5.7.1

Frontend Version:
@epicgames-ps/wilbur 3.0.0

Problem component
Signalling Web Server

Description
Unable to access REST API without serving web server

Steps to Reproduce:

1. Run Wilbur with serve set to false and rest_api set to true
2. Try access localhost/api/status
3. Observe 426 Upgrade Required error

Expected behavior
The REST API can be accessed

Additional context
Add any other context about the problem here.