Build type definitions

[kentcdodds]

The build/index.js file generated by Remix's build doesn't have types associated. As a result, I'm getting a TypeScript error in my server when trying to follow the template by @jacob-ebey in #6229:

Type 'typeof import("/Users/kentcdodds/code/epicweb-dev/rocket-rental/build/index")' is not assignable to type 'ServerBuild'.
  The types of 'entry.module' are incompatible between these types.
    Property 'default' is missing in type '{}' but required in type 'ServerEntryModule'.ts(2322)
build.d.ts(32, 5): 'default' is declared here.
server.d.ts(18, 5): The expected type comes from property 'build' which is declared here on type '{ build: ServerBuild; getLoadContext?: GetLoadContextFunction | undefined; mode?: string | undefined; }'

Because the build is a .js file, TypeScript doesn't know what the types for it are. Would it be possible for Remix to write a .d.ts file next to the build/index.js?

[kentcdodds]

Alternatively, Remix could export a handy util to validate the build object is correct at runtime.

[pcattori]

Yes we already have plans for providing public types for main Remix artifacts (config, assets manifest, server build)