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

src/components/layout/Page.js

@@ -0,0 +1,20 @@
+import classNames from 'classnames';
+import { Banner, Loading } from 'react-basics';
+import useMessages from 'components/hooks/useMessages';
+import styles from './Page.module.css';
+
+export function Page({ className, error, loading, children }) {
+  const { formatMessage, messages } = useMessages();
+
+  if (error) {
+    return <Banner variant="error">{formatMessage(messages.error)}</Banner>;
+  }
+
+  if (loading) {
+    return <Loading icon="spinner" size="xl" position="page" />;
+  }
+
+  return <div className={classNames(styles.page, className)}>{children}</div>;
+}
+
+export default Page;