What is the idomatic approach to keeping config values in sync between the wrangler.jsonc for backend Workers deploy and the frontend assets build+deploy? I would like a single source of truth for both backend and frontend for things like deployed URL/domain, public keys, etc. The best I've come up with still has values repeated across wrangler config and another place for the VITE_* env vars for the frontend project. Can we reference env vars in the wrangler.jsonc or is this a case of parsing the whole JSON file and setting values for my frontend that way?