chore: add entry.server.tsx to functions template

[pieh]

Description

Seems like default Remix server entry is behaving weirdly and is not closing connection after send content and only eventually after 5s (default timeout) connection is closed which is reported as slow response ( https://answers.netlify.com/t/remix-very-slow/115440 )

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[kennygoff]

Left a comment on that Support thread with this but the remix-adapter already exports this functionality in handleRequest and old versions of the template (see a5ca44) have a single-line re-export.

Should go back to this for remix.init/functions/app/entry.server.tsx:

export { handleRequest as default } from "@netlify/remix-adapter";

And according to this guide, remix.init/edge/app/entry.server.tsx should be updated. Although the adapter also still has a remix-edge version of handleRequest which would conflict with the original version.

// @ts-expect-error virtual module
// eslint-disable-next-line import/no-unresolved
export { default } from "virtual:netlify-server-entry";

The old version for reference:

export { handleRequest as default } from "@netlify/remix-edge-adapter";