chore: configure vitest with project-based setup and coverage

apps/api/tsconfig.json

@@ -2,8 +2,12 @@
   "extends": "../../tsconfig.base.json",
   "references": [
     { "path": "../../packages/shared" },
-    { "path": "../../packages/db" }
+    { "path": "../../packages/db" },
   ],
-  "compilerOptions": { "module": "NodeNext", "moduleResolution": "NodeNext" },
-  "include": ["src"]
+  "compilerOptions": {
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "types": ["vitest/globals"],
+  },
+  "include": ["src"],
 }

apps/api/vitest.config.ts

@@ -0,0 +1,3 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({ test: { environment: "node", globals: true } });