test: create lib function for getting mocked env variables

.vscode/test.code-snippets

@@ -45,15 +45,13 @@
       "",
       "import app from \"~/index\";",
       "import { server } from \"~/mocks\";",
-      "import { getDb, resetDb } from \"~/models/db\";",
+      "import { resetDb } from \"~/models/db\";",
+      "import { getTestDb } from \"~/libs/test/getTestDb\";",
       "",
       "server.listen();",
       "",
       "describe(\"requests the /$1 route\", () => {",
-      "  const db = getDb({",
-      "    TURSO_URL: process.env.TURSO_URL ?? \"http://127.0.0.1:3000\",",
-      "    TURSO_AUTH_TOKEN: process.env.TURSO_AUTH_TOKEN ?? \"asd\",",
-      "  });",
+      "  const db = getTestDb();",
       "",
       "  beforeEach(async () => {",
       "    await resetDb();",