ggt to sync changes to Gadget and then do live updates via HMR.shopify.app.local.toml file or similar, and run the web app part on localhost and use the Shopify CLI's tunnelling functionality to point to it, at least while I'm doing mainly frontend changes.shopify.web.toml file with a command along the lines of dev = "npm exec remix vite:dev" to run up the web app on localhost.--config my-config.js flag maybe.