chore: add entry.server.tsx to functions template

remix.init/functions/app/entry.server.tsx

@@ -0,0 +1,79 @@
+import { PassThrough } from "node:stream";
+
+import type { AppLoadContext, EntryContext } from "@remix-run/node";
+import { createReadableStreamFromReadable } from "@remix-run/node";
+import { RemixServer } from "@remix-run/react";
+import { isbot } from "isbot";
+import { renderToPipeableStream } from "react-dom/server";
+
+const ABORT_DELAY = 5_000;
+
+export default function handleRequest(
+  request: Request,
+  responseStatusCode: number,
+  responseHeaders: Headers,
+  remixContext: EntryContext,
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  loadContext: AppLoadContext
+) {
+  const bot = isbot(request.headers.get("user-agent"));
+  return new Promise((resolve, reject) => {
+    let shellRendered = false;
+    const body = new PassThrough();
+    const stream = createReadableStreamFromReadable(body);
+
+    const { pipe, abort } = renderToPipeableStream(
+      <RemixServer
+        context={remixContext}
+        url={request.url}
+        abortDelay={ABORT_DELAY}
+      />,
+      {
+        onShellReady() {
+          if (!bot) {
+            shellRendered = true;
+            responseHeaders.set("Content-Type", "text/html");
+            resolve(
+              new Response(stream, {
+                headers: responseHeaders,
+                status: responseStatusCode,
+              })
+            );
+            pipe(body);
+          }
+        },
+        onShellError(error: unknown) {
+          reject(error);
+        },
+        onAllReady() {
+          // Avoid a bug where responses aren't flushed if there's an outstanding timer.
+          clearTimeout(timer);
+          if (bot) {
+            shellRendered = true;
+            responseHeaders.set("Content-Type", "text/html");
+            resolve(
+              new Response(stream, {
+                headers: responseHeaders,
+                status: responseStatusCode,
+              })
+            );
+            pipe(body);
+          }
+        },
+        onError(error: unknown) {
+          responseStatusCode = 500;
+          // Log streaming rendering errors from inside the shell.  Don't log
+          // errors encountered during initial shell rendering since they'll
+          // reject and get logged in handleDocumentRequest.
+          if (shellRendered) {
+            console.error(error);
+          }
+        },
+      }
+    );
+
+    const timer = setTimeout(() => {
+      abort();
+    }, ABORT_DELAY);
+  });
+}