feat: add blackbox monitoring and app3 deployment

- Add blackbox exporter role and playbooks
- Add cadvisor, docker, httpbin roles
- Add app3 deployment playbooks
- Configure blackbox monitoring

roles/blackbox_exporter/files/blackbox.yml

@@ -0,0 +1,42 @@
+modules:
+  # HTTP проверка (2xx статус)
+  http_2xx:
+    prober: http
+    timeout: 10s
+    http:
+      valid_status_codes: [200, 301, 302, 403]
+      method: GET
+      preferred_ip_protocol: "ip4"
+      follow_redirects: true
+      fail_if_ssl: false
+      fail_if_not_ssl: false
+      tls_config:
+        insecure_skip_verify: true  # для тестового стенда
+      
+  # HTTP POST проверка
+  http_post_2xx:
+    prober: http
+    http:
+      method: POST
+      preferred_ip_protocol: "ip4"
+      
+  # TCP подключение
+  tcp_connect:
+    prober: tcp
+    timeout: 5s
+    
+  # SSL проверки (можно добавить позже)
+  ssl_check:
+    prober: http
+    http:
+      fail_if_not_ssl: true
+      tls_config:
+        insecure_skip_verify: false
+      preferred_ip_protocol: "ip4"
+      
+  # ICMP (ping)
+  icmp_check:
+    prober: icmp
+    timeout: 5s
+    icmp:
+      preferred_ip_protocol: "ip4"