docs: added error reporting

docs/how-to/error-boundary.md

@@ -22,7 +22,6 @@ import { Route } from "./+types/root";
 export function ErrorBoundary({
   error,
 }: Route.ErrorBoundaryProps) {
-  console.error(error);
   if (isRouteErrorResponse(error)) {
     return (
       <>

docs/how-to/error-reporting.md

@@ -1,4 +1,36 @@
 ---
 title: Error Reporting
-hidden: true
 ---
+
+# Error Reporting
+
+React Router catches errors in your route modules and sends them to [error boundaries](./error-boundary) to prevent blank pages when errors occur. However, ErrorBoundary isn't sufficient for logging and reporting errors. To access these caught errors, use the handleError export of the server entry module.
+
+## 1. Reveal the server entry
+
+If you don't see `entry.server.tsx` in your app directory, you're using a default entry. Reveal it with this cli command:
+
+```shellscript nonumber
+react-router reveal
+```
+
+## 2. Export your error handler
+
+This function is called whenever React Router catches an error in your application on the server.
+
+```tsx filename=entry.server.tsx
+import { type HandleErrorFunction } from "react-router";
+
+export const handleError: HandleErrorFunction = (
+  error,
+  { request }
+) => {
+  // React Router may abort some interrupted requests, don't log those
+  if (!request.signal.aborted) {
+    myReportError(error);
+
+    // make sure to still log the error so you can see it
+    console.error(error);
+  }
+};
+```