Moved code into src folder. Added build for component library.

src/components/pages/realtime/RealtimeCountries.js

@@ -0,0 +1,36 @@
+import { useCallback } from 'react';
+import { useRouter } from 'next/router';
+import DataTable from 'components/metrics/DataTable';
+import useLocale from 'components/hooks/useLocale';
+import useCountryNames from 'components/hooks/useCountryNames';
+import useMessages from 'components/hooks/useMessages';
+import classNames from 'classnames';
+import styles from './RealtimeCountries.module.css';
+
+export function RealtimeCountries({ data }) {
+  const { formatMessage, labels } = useMessages();
+  const { locale } = useLocale();
+  const countryNames = useCountryNames(locale);
+  const { basePath } = useRouter();
+
+  const renderCountryName = useCallback(
+    ({ x: code }) => (
+      <span className={classNames(locale, styles.row)}>
+        <img src={`${basePath}/images/flags/${code?.toLowerCase() || 'xx'}.png`} alt={code} />
+        {countryNames[code]}
+      </span>
+    ),
+    [countryNames, locale, basePath],
+  );
+
+  return (
+    <DataTable
+      title={formatMessage(labels.countries)}
+      metric={formatMessage(labels.visitors)}
+      data={data}
+      renderLabel={renderCountryName}
+    />
+  );
+}
+
+export default RealtimeCountries;