BULL-3221: Finish Express mvp

Added unit tests for dataLayer, all other changes are on the hello-express MR.

formulas/api/express.yml

@@ -2,7 +2,8 @@ useBaseline: formulas/baselines/node.yml
 
 service:
   composeFile: docker/docker-compose-express.yml
-
+    
 pipeline:
   substitutions:
     subProject: -api
+    exclusions: package-lock.json node_modules rds-ca-bundle-us-gov-west-1.cer