Moved to Angular v20 and Tailwind v4 plus all related dependencies

Renamed Docker directory.

Also serving static files from FastAPI.

overlord/src/app/purchase/purchase.resolver.spec.ts

@@ -2,7 +2,6 @@ import { TestBed } from '@angular/core/testing';
 import { ResolveFn } from '@angular/router';
 
 import { Voucher } from '../core/voucher';
-
 import { purchaseResolver } from './purchase.resolver';
 
 describe('purchaseResolver', () => {