convert logo-large into a plain white version of the logo

logo-large was a custom version of the logo made just for the banner background. It was also scaled up manually rather than taking advantage of svg's inherit scaling. This change reduces its size, makes it just a plain white version of the react logo, and moves most of the custom stuff into css. It also moves it from the static folder, over to the icons folder where it can be imported as a url.

src/icons/logo-white.svg

@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="-11.5 -10.23174 23 20.46348">
+  <title>React Logo</title>
+  <circle cx="0" cy="0" r="2.05" fill="#fff"/>
+  <g stroke="#fff" stroke-width="1" fill="transparent">
+    <ellipse rx="11" ry="4.2"/>
+    <ellipse rx="11" ry="4.2" transform="rotate(60)"/>
+    <ellipse rx="11" ry="4.2" transform="rotate(120)"/>
+  </g>
+</svg>

src/pages/index.js

@@ -18,6 +18,7 @@ import createOgUrl from 'utils/createOgUrl';
 import loadScript from 'utils/loadScript';
 import {babelURL} from 'site-constants';
 import ReactDOM from 'react-dom';
+import logoWhiteSvg from 'icons/logo-white.svg';
 
 class Home extends Component {
   constructor(props, context) {
@@ -99,10 +100,20 @@ class Home extends Component {
                 maxWidth: 1500, // Positioning of background logo
                 marginLeft: 'auto',
                 marginRight: 'auto',
-                backgroundImage: 'url(/large-logo.svg)',
-                backgroundRepeat: 'no-repeat',
-                backgroundPosition: '100% 100px',
-                backgroundSize: '50% auto',
+                position: 'relative',
+                '::before': {
+                  content: ' ',
+                  position: 'absolute',
+                  top: 0,
+                  left: 0,
+                  bottom: 0,
+                  right: 0,
+                  backgroundImage: `url(${logoWhiteSvg})`,
+                  backgroundRepeat: 'no-repeat',
+                  backgroundPosition: '100% 100px',
+                  backgroundSize: '50% auto',
+                  opacity: 0.05,
+                },
               },
             }}>
             <Container>

static/large-logo.svg

@@ -1 +0,0 @@
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