Invoices can be created

- Transactions can now be tracked

src/routes/invoice.ts

@@ -0,0 +1,9 @@
+import { Router } from "express";
+import { createInvoice } from "../controllers/invoice";
+
+const invoiceRouter = Router()
+
+invoiceRouter.get('/:id');
+invoiceRouter.post('/', createInvoice);
+
+export { invoiceRouter };