feat: integrate Uptime Kuma and Alertmanager into Docker setup

- Add Uptime Kuma service for status monitoring with health checks.
- Introduce Alertmanager service for alert management and notifications.
- Update docker-compose.yml to include new services and their configurations.
- Enhance Makefile with commands for managing Uptime Kuma and Alertmanager logs.
- Modify Ansible playbook to install necessary packages and configure SSL for new services.
- Update Nginx configuration to route traffic to Uptime Kuma and Alertmanager.
- Adjust Prometheus configuration to include alert rules and external URLs.

infra/nginx/conf.d/uptime-kuma.conf

@@ -0,0 +1,69 @@
+# Uptime Kuma Nginx Configuration
+# Proxies requests to Uptime Kuma status page
+
+# Upstream for Uptime Kuma
+upstream uptime_kuma_backend {
+    server uptime-kuma:3001;
+    keepalive 32;
+}
+
+# Status page location
+location /status {
+    # Rate limiting
+    limit_req zone=status burst=5 nodelay;
+    
+    # Proxy to Uptime Kuma
+    proxy_pass http://uptime_kuma_backend;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    
+    # WebSocket support
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+    
+    # Timeouts
+    proxy_connect_timeout 30s;
+    proxy_send_timeout 30s;
+    proxy_read_timeout 30s;
+    
+    # Buffer settings
+    proxy_buffering on;
+    proxy_buffer_size 4k;
+    proxy_buffers 8 4k;
+    
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+}
+
+# API endpoints for Uptime Kuma
+location /api/ {
+    # Rate limiting
+    limit_req zone=api burst=10 nodelay;
+    
+    # Proxy to Uptime Kuma
+    proxy_pass http://uptime_kuma_backend;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    
+    # CORS headers
+    add_header Access-Control-Allow-Origin "*" always;
+    add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
+    add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization" always;
+    
+    # Handle preflight requests
+    if ($request_method = 'OPTIONS') {
+        add_header Access-Control-Allow-Origin "*";
+        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
+        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization";
+        add_header Access-Control-Max-Age 1728000;
+        add_header Content-Type "text/plain; charset=utf-8";
+        add_header Content-Length 0;
+        return 204;
+    }
+}