refactor: update Nginx configuration and Docker setup

- Change user directive in Nginx configuration from 'nginx' to 'www-data'.
- Update upstream server configurations in Nginx to use 'localhost' instead of service names.
- Modify Nginx server block to redirect HTTP to a status page instead of Grafana.
- Rename Alertmanager location from '/alertmanager/' to '/alerts/' for consistency.
- Remove deprecated status page configuration and related files.
- Adjust Prometheus configuration to reflect the new Docker network settings.

infra/nginx/nginx.conf

@@ -1,4 +1,4 @@
-user nginx;
+user www-data;
 worker_processes auto;
 error_log /var/log/nginx/error.log warn;
 pid /var/run/nginx.pid;
@@ -65,26 +65,27 @@ http {
 
     # Upstream configurations
     upstream grafana_backend {
-        server grafana:3000;
+        server localhost:3000;
         keepalive 32;
     }
 
     upstream prometheus_backend {
-        server prometheus:9090;
+        server localhost:9090;
         keepalive 32;
     }
 
     upstream uptime_kuma_backend {
-        server uptime-kuma:3001;
+        server localhost:3001;
         keepalive 32;
     }
 
     upstream alertmanager_backend {
-        server alertmanager:9093;
+        server localhost:9093;
         keepalive 32;
     }
 
     # Main server block
+    # Redirect HTTP to HTTPS
     server {
         listen 80;
         server_name _;
@@ -96,8 +97,8 @@ http {
         server_name _;
 
         # SSL configuration (self-signed certificate)
-        ssl_certificate /etc/letsencrypt/live/{{SERVER_IP}}/fullchain.pem;
-        ssl_certificate_key /etc/letsencrypt/live/{{SERVER_IP}}/privkey.pem;еще 
+        ssl_certificate /etc/nginx/ssl/fullchain.pem;
+        ssl_certificate_key /etc/nginx/ssl/privkey.pem;
         ssl_protocols TLSv1.2 TLSv1.3;
         ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384;
         ssl_prefer_server_ciphers off;
@@ -108,9 +109,10 @@ http {
         add_header X-Frame-Options "SAMEORIGIN" always;
         add_header X-Content-Type-Options "nosniff" always;
 
-        # Redirect root to Grafana
+        # Root page - show simple status
         location = / {
-            return 301 /grafana/;
+            return 200 "Bot Infrastructure Status\n\nServices:\n- Grafana: /grafana/\n- Prometheus: /prometheus/\n- Uptime Kuma: /status/\n- Alertmanager: /alerts/\n";
+            add_header Content-Type text/plain;
         }
 
         # Health check endpoint