Update Caddyfile to use service names for reverse proxy

- Changed reverse proxy targets from localhost to service names for n8n, open-webui, flowise, langfuse-web, kong, grafana, prometheus, and searxng.
- Added basic authentication for Prometheus and SearXNG services to enhance security.
- Improved configuration for better service management in the deployment environment.

Caddyfile

@@ -7,36 +7,47 @@
 {$N8N_HOSTNAME} {
     # For domains, Caddy will automatically use Let's Encrypt
     # For localhost/port addresses, HTTPS won't be enabled
-    reverse_proxy localhost:5678
+    reverse_proxy n8n:5678
 }
 
 # Open WebUI
 {$WEBUI_HOSTNAME} {
-    reverse_proxy localhost:3000
+    reverse_proxy open-webui:8080
 }
 
 # Flowise
 {$FLOWISE_HOSTNAME} {
-    reverse_proxy localhost:3001
+    reverse_proxy flowise:3001
 }
 
 # Langfuse
 {$LANGFUSE_HOSTNAME} {
-    reverse_proxy localhost:3002
-}
-
-# Ollama API
-{$OLLAMA_HOSTNAME} {
-    reverse_proxy localhost:11434
+    reverse_proxy langfuse-web:3000
 }
 
 # Supabase
 {$SUPABASE_HOSTNAME} {
-    reverse_proxy localhost:8000
+    reverse_proxy kong:8000
+}
+
+# Grafana
+{$GRAFANA_HOSTNAME} {
+    reverse_proxy grafana:3000
+}
+
+# Prometheus
+{$PROMETHEUS_HOSTNAME} {
+    basic_auth { 
+        {$PROMETHEUS_USERNAME} {$PROMETHEUS_PASSWORD_HASH}
+    }
+    reverse_proxy prometheus:9090
 }
 
 # SearXNG
 {$SEARXNG_HOSTNAME} {
+    basic_auth { 
+        {$SEARXNG_USERNAME} {$SEARXNG_PASSWORD_HASH}
+    }
     encode zstd gzip
     
     @api {
@@ -86,10 +97,10 @@
     }
     
     # SearXNG (uWSGI)
-    reverse_proxy localhost:8080 {
+    reverse_proxy searxng:8080 {
         header_up X-Forwarded-Port {http.request.port}
         header_up X-Real-IP {http.request.remote.host}
         # https://github.com/searx/searx-docker/issues/24
         header_up Connection "close"
     }
-}
+}