Implement redux.

pages/_app.js

@@ -1,7 +1,15 @@
 import React from 'react';
+import { Provider } from 'react-redux';
+import { useStore } from 'redux/store';
 import 'styles/bootstrap-grid.css';
 import 'styles/index.css';
 
 export default function App({ Component, pageProps }) {
-  return <Component {...pageProps} />;
+  const store = useStore();
+
+  return (
+    <Provider store={store}>
+      <Component {...pageProps} />
+    </Provider>
+  );
 }