sentry: fix up import in _error

pages/_error.tsx

@@ -1,22 +1,28 @@
-// @ts-nocheck
-import * as Sentry from '@sentry/nextjs';
+import { captureException, flush } from '@sentry/nextjs';
+import type { ErrorProps } from 'next/error';
+import type { NextPage } from 'next';
 
 import NextErrorComponent from 'next/error';
 
-const MyError = ({ statusCode, hasGetInitialPropsRun, err }) => {
+interface AppErrorProps extends ErrorProps {
+  err?: Error;
+  hasGetInitialPropsRun?: boolean;
+}
+
+const MyError: NextPage<AppErrorProps> = ({ statusCode, hasGetInitialPropsRun, err }) => {
   if (!hasGetInitialPropsRun && err) {
     // getInitialProps is not called in case of
     // https://github.com/vercel/next.js/issues/8592. As a workaround, we pass
     // err via _app.js so it can be captured
-    Sentry.captureException(err);
+    captureException(err);
     // Flushing is not required in this case as it only happens on the client
   }
 
   return <NextErrorComponent statusCode={statusCode} />;
 };
 
 MyError.getInitialProps = async (context) => {
-  const errorInitialProps = await NextErrorComponent.getInitialProps(context);
+  const errorInitialProps: AppErrorProps = await NextErrorComponent.getInitialProps(context);
 
   const { res, err, asPath } = context;
 
@@ -43,20 +49,20 @@ MyError.getInitialProps = async (context) => {
   //    Boundaries: https://reactjs.org/docs/error-boundaries.html
 
   if (err) {
-    Sentry.captureException(err);
+    captureException(err);
 
     // Flushing before returning is necessary if deploying to Vercel, see
     // https://vercel.com/docs/platform/limits#streaming-responses
-    await Sentry.flush(2000);
+    await flush(2000);
 
     return errorInitialProps;
   }
 
   // If this point is reached, getInitialProps was called without any
   // information about what the error might be. This is unexpected and may
   // indicate a bug introduced in Next.js, so record it in Sentry
-  Sentry.captureException(new Error(`_error.js getInitialProps missing data at path: ${asPath}`));
-  await Sentry.flush(2000);
+  captureException(new Error(`_error.js getInitialProps missing data at path: ${asPath}`));
+  await flush(2000);
 
   return errorInitialProps;
 };