Insert version string on build

Closes esap-general#198 (closed)

src/routes/Routes.js

@@ -30,6 +30,8 @@ import AladinAdvancedPage from '../components/services/aladin/AladinAdvancedPage
 import Jobs from "../components/services/Jobs";
 import {createBrowserHistory} from "history"
 
+import { COMMIT_DATE, COMMIT_URL } from "../utils/version";
+
 export default function Routes() {
     const history = createBrowserHistory();
     const { navbar, handleLogin, handleLogout, handleError } = useContext(GlobalContext);
@@ -118,7 +120,7 @@ export default function Routes() {
 
         </Switch>
 
-      <footer><small>esap-gui version 21 jan 2022 - 10:00</small></footer>
+      <footer><small><a href={COMMIT_URL}>ESAP-GUI version {COMMIT_DATE}</a></small></footer>
     </Router>
   );
 }