fix: align lab02 and lab03 student verification flows

labs/lab-03-compute/tutorial/01-set-resource-limits.md

@@ -120,6 +120,8 @@ services:
     restart: unless-stopped
 ```
 
+Nota: in questo repository il file `docker-compose.yml` finale esiste gia. Puoi usarlo come riferimento o partire direttamente da quello presente nel lab.
+
 ### Step 2: Verificare la sintassi
 
 ```bash

labs/lab-03-compute/tutorial/02-implement-healthchecks.md

@@ -211,7 +211,7 @@ Per comandi più complessi, usa `CMD-SHELL`:
 
 ```yaml
   app:
-    image: myapp:latest
+    image: nginx:alpine
     container_name: lab03-app
     hostname: app
 
@@ -223,7 +223,7 @@ Per comandi più complessi, usa `CMD-SHELL`:
 
     # Custom healthcheck with shell
     healthcheck:
-      test: ["CMD-SHELL", "curl -f http://localhost/health || exit 1"]
+      test: ["CMD-SHELL", "curl -f http://localhost/ || exit 1"]
       interval: 15s
       timeout: 3s
       retries: 3

labs/lab-03-compute/tutorial/03-dependencies-with-health.md

@@ -226,10 +226,10 @@ docker compose logs --tail=50
 Cerca messaggi tipo:
 ```
 lab03-db  | database system is ready to accept connections
-lab03-app | Waiting for db to be healthy...
-lab03-web | Waiting for app to be healthy...
 ```
 
+Nota: le righe `Waiting for db to be healthy...` e `Waiting for app to be healthy...` sono una spiegazione didattica del comportamento atteso, non un output reale generato da nginx o postgres in questo lab.
+
 ---
 
 ## Parte 5: Testare le Dipendenze