feat(docker): update base images to Java 25, Spring 4, Jackson 3, Gradle 9 and optimize JVM options (Project Lilliput) (#5725)

Co-authored-by: Anthony Stirling <[email protected]>

testing/compose/docker-compose-ultra-lite.yml

@@ -1,8 +1,8 @@
 services:
-  backend:
+  stirling-pdf:
     build:
       context: ../..
-      dockerfile: docker/backend/Dockerfile.ultra-lite
+      dockerfile: docker/embedded/Dockerfile.ultra-lite
     container_name: Stirling-PDF-Ultra-Lite
     restart: unless-stopped
     deploy:
@@ -34,21 +34,6 @@ services:
     networks:
       - stirling-network
 
-  frontend:
-    build:
-      context: ../..
-      dockerfile: docker/frontend/Dockerfile
-    container_name: stirling-pdf-frontend-ultra-lite
-    restart: unless-stopped
-    ports:
-      - "3000:80"
-    environment:
-      BACKEND_URL: http://backend:8080
-    depends_on:
-      - backend
-    networks:
-      - stirling-network
-
 networks:
   stirling-network:
     driver: bridge