I think what you're after is fine to do (it sounds like a great idea), but there might be a minor issue:
You can only have one web server on Espruino WiFi, although I believe that web server can be accessible from both networks. Because of that, you may need to ensure that you create the Web Server after you've initialised both network interfaces?
If you're changing configuration (eg to connect to the second interface) I'd close the first server, connect to the AP, and then re-open it...
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I think what you're after is fine to do (it sounds like a great idea), but there might be a minor issue:
You can only have one web server on Espruino WiFi, although I believe that web server can be accessible from both networks. Because of that, you may need to ensure that you create the Web Server after you've initialised both network interfaces?
If you're changing configuration (eg to connect to the second interface) I'd close the first server, connect to the AP, and then re-open it...