implement/init e2e tests (#135)

* init e2e

* updated/moved vitest, finished merge

* fix bun picking up e2e tests

* e2e: overwrite webserver config with env

* e2e: added adapter configs

* e2e: replaced image

app/__test__/vitest/setup.ts

@@ -0,0 +1,8 @@
+import "@testing-library/jest-dom";
+import { afterEach } from "vitest";
+import { cleanup } from "@testing-library/react";
+
+// Automatically cleanup after each test
+afterEach(() => {
+   cleanup();
+});