Finished implementing FileUploadService + added test workflow

src/services/fileUploadService.test.ts

@@ -0,0 +1,10 @@
+import {describe, expect, it} from "vitest";
+import {FileUploadService} from "./fileUploadService";
+
+describe("fileUploadService", () => {
+    it('should upload files', async () => {
+        const service = new FileUploadService("", null, null);
+        const uploadId = await service.uploadFiles("", "", [])
+        expect(uploadId).toBe("MockUploadId")
+    });
+})