Initial commit

app/lib/definitions.ts

@@ -0,0 +1,9 @@
+export type Invoice = {
+  id: string;
+  customer_id: string;
+  amount: number;
+  date: string;
+  // In TypeScript, this is called a string union type.
+  // It means that the "status" property can only be one of the two strings: 'pending' or 'paid'.
+  status: 'pending' | 'paid';
+};