add logo

src/components/app/App.jsx

@@ -121,7 +121,9 @@ class App extends Component {
                 <Layout style={{minHeight: '100vh'}}>
 
                     <Header className="header" style={{position: 'fixed', zIndex: 1, width: '100%'}}>
-                        <div className="logo"/>
+                        <div className="logo-wrapper">
+                            <div className='logo'/>
+                        </div>
                         <Menu
                             theme="dark"
                             mode="horizontal"

src/components/app/index.css

@@ -1,11 +1,16 @@
-.logo {
+.logo-wrapper {
     width: 122px;
     height: 31px;
-    background: rgba(255,255,255,.2);
-    /*background-image: url("../../images/logo.png");*/
+    /*background: rgba(255,255,255,.2);*/
     margin: 16px 28px 16px 0;
     float: left;
 }
+
+.logo {
+    background-image: url("../../images/logo.png");
+    background-repeat:no-repeat; background-size:100% 100%;
+}
+
 .change-locale {
     margin-bottom: 16px;
 }