test(test): added in vitest to start doing more testing before deploying

vitest.config.ts

@@ -3,6 +3,6 @@ import { defineConfig } from "vitest/config";
 export default defineConfig({
 	test: {
 		globals: true,
-		include: ["tests/**/*.test.ts"], // ← point to your tests folder
+		include: ["backend/**/*.test.ts"], // ← point to your tests folder
 	},
 });