feat(lab-02): complete Phase 3 - Network & VPC lab

Implement Lab 02 with Docker bridge networks simulating VPC/Subnets.

Test Infrastructure (RED phase):
- 6 bash test scripts for network creation, isolation, INF-02 compliance
- Fail-fast orchestration with run-all-tests.sh
- Quick validation script for development

Documentation (Diátaxis framework):
- 3 tutorials: VPC creation, container deployment, isolation verification
- 4 how-to guides: create network, inspect config, test isolation, cleanup
- 3 reference docs: Docker network commands, Compose syntax, VPC mapping
- 1 explanation: Docker ↔ VPC parallels (PARA-01/02/03/04)

Infrastructure (GREEN phase):
- docker-compose.yml with VPC networks (10.0.1.0/24, 10.0.2.0/24)
- 5 services: web, app, db, test-public, test-private
- INF-02 compliant: 127.0.0.1 bindings only, no 0.0.0.0
- Private network with --internal flag
- Multi-homed app container (public + private networks)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

labs/lab-02-network/how-to-guides/cleanup-networks.md

@@ -0,0 +1,102 @@
+# How-To: Pulire le Reti Docker
+
+Guida per rimuovere reti, container e volumi Docker.
+
+## Pulire Container e Reti
+
+### Singola Rete
+
+```bash
+# Rimuovi rete specifica
+docker network rm my-network
+```
+
+### Tutte le Reti Custom (preserva bridge, host, none)
+
+```bash
+# Lista solo reti custom
+docker network ls --filter 'type=custom' -q | xargs docker network rm
+```
+
+## Pulire Container e Reti Together
+
+### Ferma e Rimuovi Tutti i Container
+
+```bash
+docker stop $(docker ps -aq)
+docker rm $(docker ps -aq)
+```
+
+### Rimuovi Tutte le Reti Non Usate
+
+```bash
+docker network prune
+```
+
+## Pulire per Lab Specifico
+
+### Lab 02 Network Cleanup
+
+```bash
+cd ~/laboratori-cloud/labs/lab-02-network
+
+# Ferma e rimuovi container del compose
+docker compose down
+
+# Rimuovi reti specifiche
+docker network rm lab02-vpc-public lab02-vpc-private 2>/dev/null || true
+
+# Rimuovi volumi (opzionale)
+docker volume rm lab02-network_db-data 2>/dev/null || true
+```
+
+### Reset Completo Lab 02
+
+```bash
+cd ~/laboratori-cloud/labs/lab-02-network
+
+# Tutto giu
+docker compose down -v --remove-orphans
+docker network prune -f
+docker volume prune -f
+```
+
+## Verificare lo Stato di Pulizia
+
+```bash
+# Container attivi
+docker ps
+
+# Reti presenti
+docker network ls
+
+# Volumi presenti
+docker volume ls
+```
+
+## Troubleshooting
+
+### Rete in Uso da Container
+
+```bash
+# Trova container usando la rete
+docker network inspect my-network --format '{{json .Containers}}' | jq '.[] | .Name'
+
+# Scollega tutti i container
+docker network disconnect -f my-network $(docker network inspect my-network --format '{{json .Containers}}' | jq -r '.[] | .Name')
+
+# Rimuovi rete
+docker network rm my-network
+```
+
+### Container con Rete "Ghost"
+
+```bash
+# Pulizia completa Docker
+docker system prune -a --volumes
+```
+
+## Vedi Anche
+
+- [Reference: Docker Network Commands](../reference/docker-network-commands.md)
+- [How-To: Reset Ambiente Docker](../../how-to-guides/reset-docker-environment.md)