Add links for adding issues or contributions (#14)

Adds a section to the bottom of the page which houses links to ASU's
issues page and the github repository for the firmware wizard.

Signed-off-by: Sudhanshu Gautam <me@sudhanshug.com>

src/App.js

@@ -8,6 +8,7 @@ import Header from './components/header.js';
 import Home from './containers/home/home';
 import NotFound from './containers/not-found/not-found';
 import LinearProgress from '@material-ui/core/LinearProgress';
+import { Paper } from '@material-ui/core';
 
 const theme = createMuiTheme({
   palette: {
@@ -34,6 +35,14 @@ function App() {
               <Route default component={NotFound}/>
             </Switch>
           </Router>
+          <Paper elevation={4} className="report-problem-container">
+            <span>
+              If you come across any issue, feel free to report <a href="https://github.com/aparcar/attendedsysupgrade-server/issues">here</a>.
+            </span>
+            <span className="report-link">
+              For contributions, go to <a href="https://github.com/sudhanshu16/openwrt-firmware-selector/">Github</a>
+            </span>
+          </Paper>
         </div>
       </Suspense>
     </ThemeProvider>

src/App.scss

@@ -27,6 +27,23 @@
   color: #61dafb;
 }
 
+.report-problem-container {
+  display: block;
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  width: 100%;
+  background-color: #fff;
+  padding: 15px 10%;
+  box-sizing: border-box;
+  text-align: left;
+  border-radius: 0
+}
+
+.report-link {
+  float: right;
+}
+
 @keyframes App-logo-spin {
   from {
     transform: rotate(0deg);