resolve comment issues and setup tests

Author: feliciagan

backend/qn-history-service/jest.config.ts

@@ -137,7 +137,7 @@ const config: Config = {
   // setupFiles: [],
 
   // A list of paths to modules that run some code to configure or set up the testing framework before each test
-  // setupFilesAfterEnv: [],
+  setupFilesAfterEnv: ["./tests/setup.ts"],
 
   // The number of seconds after which a test is considered as slow and reported as such in the results.
   // slowTestThreshold: 5,