Moving some styling out of App and into index

client/src/App.js

@@ -3,9 +3,6 @@ import styled from 'styled-components';
 import Game from "./components/Game";
 
 const Wrapper = styled.div`
-  background-color: #222;
-  color: #ccc;
-  font-weight: 500;
   height: 100%;
   width: 100%;
   display: flex;

client/src/index.css

@@ -7,6 +7,7 @@ body {
   -moz-osx-font-smoothing: grayscale;
   background-color: #222;
   color: #ccc;
+  font-weight: 500;
 }
 
 code {