WIP: Extract process.env

Change-Id: I9efb1079c0c88e6e0272c5fda734a367aa8f84a3

src/synapse/authProvider.js

@@ -1,10 +1,10 @@
 import { fetchUtils } from "react-admin";
 
-const authProvider = {
+const authProvider = fixed_base_url => ({
   // called when the user attempts to log in
   login: ({ base_url, username, password, loginToken }) => {
     // force homeserver for protection in case the form is manipulated
-    base_url = process.env.REACT_APP_SERVER || base_url;
+    base_url = fixed_base_url || base_url;
 
     console.log("login ");
     const options = {
@@ -86,6 +86,6 @@ const authProvider = {
   },
   // called when the user navigates to a new location, to check for permissions / roles
   getPermissions: () => Promise.resolve(),
-};
+});
 
 export default authProvider;