Added super user for whole service management

docker-compose.dev.yaml

@@ -36,6 +36,11 @@ services:
       - ./backend:/app
     env_file:
       - .env
+    environment:
+      # Super Admin credentials (optional - if set, creates master user at startup)
+      - SUPER_ADMIN_USERNAME=${SUPER_ADMIN_USERNAME:-}
+      - SUPER_ADMIN_EMAIL=${SUPER_ADMIN_EMAIL:-}
+      - SUPER_ADMIN_PASSWORD=${SUPER_ADMIN_PASSWORD:-}
     depends_on:
       keycloak:
         condition: service_healthy