Preview your coding agents' work without painful CIs or servers; just paste a prompt

In recent months, I felt terribly painful about deploying my work-in-progress code to a public server. Imagine a scene where you need to go to the gym, but you don't want to waste the subscription budget from Claude or Codex, so you set up Happy or Paseo. They have done really well at remote controlling coding agents, but there is still a gap between the formative work produced by coding agents and a sharable live environment. For the current workflow, you need to buy a server - probably from Hetzner or DigitalOcean - as the "staging server.