Floris The best option would be to fully acces the IDE over the internet.
Ah well. Here's the thing: this is currently possible, but also you probably shouldn't do it. If you do some magic on your router/firewall (and assuming you know what you are doing and have appropriate permission to do that), you should be able via port forwarding to expose port 80 of the device that the Bela board is on in order to access it over the internet. As I was saying, you probably shouldn't do that, because there is no password-protected access to the board, so any evil actor scanning the web for open ports could identify it and access it. The only case where such a solution would be relatively safe to use is if your router/firewall allows to restrict the IP address that can access the device and you have a static IP address that you can access it from.
Secure solutions would require an authentication and permission-based access to the pages of the IDE, but that's something we are not planning to add any time soon. This would still not save you from DDoS attacks (or even DoS, as it really doesn't take many pings to freeze a small ARM CPU doing heavy audio processing).