I've been having fun with OpenCode's webui in a Sprite, set it up right in Termux and you can vibe code a website with a full backend from your phone. I have a Termux shortcut that sets up a port forward and pops open my web browser to the OpenCode webui. OpenCode can pick up the Sprite skill built into the containers so it can manage the instance itself (mostly setting up and destroying services).

Of course you can do similar with a VPS, but this makes it very easy (and cheap!) to spin up an entire new machine with a public url and HTTPS whenever you want to.