Update: Read API Hostname from LocalStorage

@petar.hristov

it would be nice if you could merge my contribution in one of the next sprints :-)

src/apis.ts

@@ -45,6 +45,10 @@ if (typeof window !== 'undefined') {
 }
 
 const getHostName = () => {
+  const localStorageHostName = typeof window !== 'undefined' ? localStorage.getItem('coscine.api.hostname') : null;
+  if(localStorageHostName){
+    return localStorageHostName;
+  }
   let hostName = typeof window !== 'undefined' ? window.location.hostname : 'coscine.rwth-aachen.de';
   if (hostName.indexOf(':') !== -1) {
     if (hostName.indexOf('https://') !== -1) {