feat(docker): Add Consul to docker-compose and update documentation

- Add Consul service to docker-compose.yml
  - Running in dev mode on port 8500
  - Health checks configured
  - Persistent volume for data
  - Web UI available at http://localhost:8500/ui

- Update SUMMARY.md
  - Document Consul setup in docker-compose
  - Add Consul verification steps
  - Update prerequisites to include Docker Compose
  - Add note about Consul Web UI

- Remove obsolete version field from docker-compose.yml

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   postgres:
     image: postgres:16-alpine
@@ -20,9 +18,27 @@ services:
     networks:
       - goplt-network
 
+  consul:
+    image: consul:latest
+    container_name: goplt-consul
+    command: consul agent -dev -client=0.0.0.0
+    ports:
+      - "8500:8500"
+    volumes:
+      - consul_data:/consul/data
+    healthcheck:
+      test: ["CMD-SHELL", "consul members"]
+      interval: 10s
+      timeout: 3s
+      retries: 5
+    networks:
+      - goplt-network
+
 volumes:
   postgres_data:
     driver: local
+  consul_data:
+    driver: local
 
 networks:
   goplt-network: