chore(docker): Migrate IAM service configuration to main docker-compose file

- Added IAM service configuration to the local docker-compose.yml for streamlined deployment.
- Removed the separate docker-compose.yml file from the IAM service directory to consolidate service definitions.

deployments/local/docker-compose.yml

@@ -158,6 +158,9 @@ services:
 
   # IAM Service .NET - Identity and Access Management (Duende IdentityServer)
   iam-service-net:
+    build:
+      context: ../../services/iam-service-net
+      dockerfile: Dockerfile
     image: goodgo/iam-service-net:latest
     container_name: iam-service-net-local
     env_file: