Allow builds for website mode

[a2937]

Is your feature request related to a problem? Please describe.
I can't inspect the mobile app and figure out why the first step for the Cat Photo App is broken. One of the three things must not be true.

document.querySelectorAll('style').length == 1
document.querySelectorAll('link').length == 0 
document.querySelectorAll('script').length <= 2 

Describe the solution you'd like
I want the Flutter project CLI to be ran to add the alternative platform.

Describe alternatives you've considered
While we can just ignore it for now or remove the failing test, testing for browser extensions that could interfere with tests is reasonable.

Additional context
I am wondering if there's anything special that needs to be done to ensure the app properly loads in a web browser compared to a mobile app, and if there are any special requirements that must be followed.

My initial guess is that there might not be any connected style elements to the mobile app, but I don't have any proof yet.