Moved to Angular v20 and Tailwind v4 plus all related dependencies

Renamed Docker directory.

Also serving static files from FastAPI.

overlord/src/app/purchase-entries/purchase-entries.routes.ts

@@ -1,7 +1,6 @@
 import { Routes } from '@angular/router';
 
 import { authGuard } from '../auth/auth-guard.service';
-
 import { PurchaseEntriesComponent } from './purchase-entries.component';
 import { purchaseEntriesResolver } from './purchase-entries.resolver';