Added Sentry Integration

pages/_error.js

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+import NextErrorComponent from 'next/error';
+
+import * as Sentry from '@sentry/nextjs';
+
+const MyError = ({ 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);
+    // 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 { res, err, asPath } = context;
+
+  // Workaround for https://github.com/vercel/next.js/issues/8592, mark when
+  // getInitialProps has run
+  errorInitialProps.hasGetInitialPropsRun = true;
+
+  // Returning early because we don't want to log 404 errors to Sentry.
+  if (res?.statusCode === 404) {
+    return errorInitialProps;
+  }
+  
+  // Running on the server, the response object (`res`) is available.
+  //
+  // Next.js will pass an err on the server if a page's data fetching methods
+  // threw or returned a Promise that rejected
+  //
+  // Running on the client (browser), Next.js will provide an err if:
+  //
+  //  - a page's `getInitialProps` threw or returned a Promise that rejected
+  //  - an exception was thrown somewhere in the React lifecycle (render,
+  //    componentDidMount, etc) that was caught by Next.js's React Error
+  //    Boundary. Read more about what types of exceptions are caught by Error
+  //    Boundaries: https://reactjs.org/docs/error-boundaries.html
+
+  if (err) {
+    Sentry.captureException(err);
+
+    // Flushing before returning is necessary if deploying to Vercel, see
+    // https://vercel.com/docs/platform/limits#streaming-responses
+    await Sentry.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);
+
+  return errorInitialProps;
+};
+
+export default MyError;

sentry.client.config.js

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+// This file configures the initialization of Sentry on the browser.
+// The config you add here will be used whenever a page is visited.
+// https://docs.sentry.io/platforms/javascript/guides/nextjs/
+
+import * as Sentry from '@sentry/nextjs';
+
+const SENTRY_DSN = process.env.SENTRY_DSN || process.env.NEXT_PUBLIC_SENTRY_DSN;
+
+Sentry.init({
+  dsn: SENTRY_DSN,
+  // Adjust this value in production, or use tracesSampler for greater control
+  tracesSampleRate: 1.0,
+  // ...
+  // Note: if you want to override the automatic release value, do not set a
+  // `release` value here - use the environment variable `SENTRY_RELEASE`, so
+  // that it will also get attached to your source maps
+});

sentry.server.config.js

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+// This file configures the initialization of Sentry on the server.
+// The config you add here will be used whenever the server handles a request.
+// https://docs.sentry.io/platforms/javascript/guides/nextjs/
+
+import * as Sentry from '@sentry/nextjs';
+
+const SENTRY_DSN = process.env.SENTRY_DSN || process.env.NEXT_PUBLIC_SENTRY_DSN;
+
+Sentry.init({
+  dsn: SENTRY_DSN,
+  // Adjust this value in production, or use tracesSampler for greater control
+  tracesSampleRate: 1.0,
+  // ...
+  // Note: if you want to override the automatic release value, do not set a
+  // `release` value here - use the environment variable `SENTRY_RELEASE`, so
+  // that it will also get attached to your source maps
+});