Add homepage UI

pages/_app.tsx

@@ -1,11 +1,10 @@
 import type { AppProps } from 'next/app';
 import { ChakraProvider } from '@chakra-ui/react';
-
-import '../styles/globals.css';
+import { roadmapTheme } from './theme';
 
 function MyApp({ Component, pageProps }: AppProps) {
   return (
-    <ChakraProvider>
+    <ChakraProvider theme={roadmapTheme}>
       <Component {...pageProps} />
     </ChakraProvider>
   );