[Issue/Suggestion] Maintenance page coded as a 503
Detailed Description
The current maintenance pages (Unscheduled Maintenance and Scheduled Maintenance) should become HTTP Error 503 Service Unavailable pages, instead of being redirects of the home page during maintenance. I believe that the current implementation was to cause redirect all HTTP Requests to the website to the respective pages, which causes an issue when the maintenance ended (ie. a refresh of the page would not allow the user to see the original main page).
Context
Days ago, when we had the maintenance to update the aircraft statistics, there was a temporary maintenance page that would state that the website is under scheduled maintenance. What happened was that after the maintenance was lifted, we were not able to refresh the page to regain access to the main page. I believe that such an issue is due to a HTTP 3xx (probably 302) being given rather than a HTTP 503. Including the HTTP 503 instead of redirecting to the maintenance page would definitely prevent such an issue from cropping up the next time any maintenance occurs.