use caddyfile instead of api

internal/app/routes_handlers.go

@@ -3,6 +3,7 @@ package app
 import (
 	"encoding/json"
 	"net/http"
+	"os"
 	osuser "os/user"
 	"strconv"
 	"strings"
@@ -275,10 +276,25 @@ func (a *App) handleCaddyConfig(w http.ResponseWriter, r *http.Request, _ User)
 		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
 		return
 	}
+	if a.cfg.CaddyRouteEnabled && strings.TrimSpace(a.cfg.CaddyFragmentPath) != "" {
+		content, err := os.ReadFile(a.cfg.CaddyFragmentPath)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadGateway)
+			return
+		}
+		writeJSON(w, http.StatusOK, map[string]any{
+			"format":  "caddyfile",
+			"content": string(content),
+		})
+		return
+	}
 	cfg, err := a.fetchCaddyConfig(r.Context())
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusBadGateway)
 		return
 	}
-	writeJSON(w, http.StatusOK, cfg)
+	writeJSON(w, http.StatusOK, map[string]any{
+		"format":  "json",
+		"content": mustJSONPretty(cfg),
+	})
 }