Add OAuth support

OHIFViewer-react/public/logout-redirect.html

@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>OpenID Connect Logout Redirect Page</title>
+</head>
+<body>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/es5-shim/4.5.7/es5-shim.min.js"></script>
+    <script type="text/javascript" src='es6-shim.min.js'></script>
+    <script type="text/javascript" src='oidc-client.min.js'></script>
+    <script type="text/javascript" src='polyfill.min.js'></script>
+    <script type="text/javascript">
+      // TODO: I think this is actually not necessary anymore
+      new UserManager().signoutRedirectCallback().then(function() {
+        // TODO: Keycloak + Auth0 is not properly logging out both sessions?
+        // This is a hacky hardcoded workaround. This could also be added as a component to the React application rather than a static page.
+        var path = 'https://www.crowds-cure.org';
+        var client_id = 'z5cXMPTxeFOdB3i4xRA8JyhTonQmqMKM';
+        var url = 'https://auth.crowds-cure.org/v2/logout?client_id=' + client_id + '&returnTo=' + path;
+        window.location.href = url;
+      });
+    </script>
+</body>
+
+</html>