template.yml needs update

[T-Nik]

After session with AWS support, result was template.yml needs an update so Amplify builds the frontend. Otherwise got error:
[ERROR]: !!! Unable to assume specified IAM Role. Please ensure the selected IAM Role has sufficient permissions and the Trust Relationship is configured correctly.

Following update of the steps in template.yml seems to work

-        applications:
-          - frontend:
-              phases:
-                preBuild:
-                  commands:
-                    - npm ci
-                build:
-                  commands:
-                    - npm run build
-              artifacts:
-                baseDirectory: dist
-                files:
-                  - '**/*'
-              cache:
-                paths:
-                  - node_modules/**/*
-            appRoot: frontend
+        frontend:
+          phases:
+            preBuild:
+              commands:
+                - cd frontend
+                - npm ci
+            build:
+              commands:
+                - npm run build
+          artifacts:
+            baseDirectory: frontend/dist
+            files:
+              - '**/*'
+          cache:
+            paths:
+              - node_modules/**/*