adding db env declaration

overlays/dev/patch-deployment.yaml

@@ -8,12 +8,22 @@ spec:
     spec:
       containers:
         - name: employee-backend
+          image: docker.io/adelyao/employee-be:build-28
           env:
             - name: NODE_ENV
               value: "development"
             - name: LOG_LEVEL
               value: "debug"
-          image: docker.io/adelyao/employee-be:build-28
+            - name: DB_HOST
+              value: "dev-db"
+            - name: DB_NAME
+              value: "employee_app"
+          envFrom:
+            - configMapRef:
+                name: dev-app-config
+            - secretRef:
+                name: dev-db-secret
+          
 ---
 apiVersion: apps/v1
 kind: Deployment
@@ -25,9 +35,9 @@ spec:
     spec:
       containers:
         - name: employee-frontend
+          image: docker.io/adelyao/employee-fe:build-28
           env:
             - name: VITE_API_URL
               value: "http://backend-service:4000"
             - name: MODE
               value: "development"
-          image: docker.io/adelyao/employee-fe:build-28