revert: "build: Migrate to Vite 🚀" (#6814)

Revert "build: Migrate to Vite 🚀 (#6713)"

This reverts commit e93bbc5776.

src/setupTests.ts

@@ -1,16 +1,19 @@
-// vitest.setup.ts
-import "vitest-canvas-mock";
 import "@testing-library/jest-dom";
-import { vi } from "vitest";
+import "jest-canvas-mock";
+import dotenv from "dotenv";
 import polyfill from "./polyfill";
 
 require("fake-indexeddb/auto");
 
 polyfill();
+// jest doesn't know of .env.development so we need to init it ourselves
+dotenv.config({
+  path: require("path").resolve(__dirname, "../.env.development"),
+});
 
-vi.mock("nanoid", () => {
+jest.mock("nanoid", () => {
   return {
-    nanoid: vi.fn(() => "test-id"),
+    nanoid: jest.fn(() => "test-id"),
   };
 });
 // ReactDOM is located inside index.tsx file