Deploy Pathora Viewer: tile server, viewer components, and root app.py

frontend/src/AppRouter.tsx

@@ -4,10 +4,13 @@ import { App } from "./App";
 import { PathoraViewer } from "./components/viewer/PathoraViewer";
 
 export function AppRouter() {
-  return <BrowserRouter>
-        <Routes>
-          <Route path="/" element={<App />} />
-          <Route path="/viewer" element={<PathoraViewer />} />
-        </Routes>
-    </BrowserRouter>;
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/" element={<PathoraViewer />} />
+        <Route path="/app" element={<App />} />
+        <Route path="/viewer" element={<PathoraViewer />} />
+      </Routes>
+    </BrowserRouter>
+  );
 }