BULL-3221: Finish Express mvp

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

formulas/db/postgres.yml

@@ -11,10 +11,14 @@ getLocalDevFiles:
     to: config/postgres-entrypoint.sh
 
 getProjectDirs:
-  - from: db-updates/node/postgres
-    to: src/data
+  - from: db-updates/node/postgres/migrations
+    to: src/data/migrations
 
 getProjectFiles:
+  - from: db-updates/node/postgres/dataLayer.js
+    to: src/data/dataLayer.js
+  - from: db-updates/node/postgres/dataLayer.spec.js
+    to: src/data/dataLayer.spec.js
   - from: db-updates/node/postgres/package.json
     to: package.json
     merge: true