Starts the dev instances of dev/instances.ts, for deno task dev: for each, an API server that restarts on change and a Vite server, wired to each other and kept apart from the other instances by the rule that module states. Every line they print is prefixed with the instance's name. Ctrl+C stops them all, and so does any of them stopping, such as a Vite server whose port is taken.

It runs with the base .env loaded, which every server inherits, and starts the instances it is given by name, or all of them. In the devcontainer, each instance's service in .devcontainer/compose.yaml runs it for that instance; outside, deno task dev runs it.