Use main listen for nginx

tesseract/genconf/nginx.go

@@ -10,8 +10,8 @@ import (
 )
 
 const nginxTemplate = `server {
-    listen 8080;
-    listen [::]:8080;
+    listen {{.ListenPort}};
+    listen [::]:{{.ListenPort}};
     
     # Replace with your actual domain(s)
     server_name {{.MonitoringHost}};
@@ -70,13 +70,23 @@ const nginxTemplate = `server {
 `
 
 type NginxTemplateData struct {
-	MonitoringHost  string
+	MonitoringHost string
 	LocalDirectory string
+	ListenPort     string
 }
 
 func generateNginx(yamlFile string) {
 	config := loadConfig(yamlFile)
 
+	// Extract port from first listen address
+	listenPort := "8080" // fallback default
+	if len(config.Listen) > 0 {
+		port := extractPort(config.Listen[0])
+		if port != "" {
+			listenPort = port
+		}
+	}
+
 	for _, log := range config.Logs {
 		// Extract hostname from monitoring prefix
 		hostname, err := extractHostname(log.MonitoringPrefix)
@@ -87,8 +97,9 @@ func generateNginx(yamlFile string) {
 
 		// Create template data
 		data := NginxTemplateData{
-			MonitoringHost:  hostname,
+			MonitoringHost: hostname,
 			LocalDirectory: log.LocalDirectory,
+			ListenPort:     listenPort,
 		}
 
 		// Parse and execute template
@@ -121,6 +132,25 @@ func generateNginx(yamlFile string) {
 	}
 }
 
+func extractPort(listenAddr string) string {
+	// Handle common listen address formats:
+	// ":8080" -> "8080"
+	// "localhost:8080" -> "8080"
+	// "[::]:8080" -> "8080"
+
+	if strings.HasPrefix(listenAddr, ":") {
+		return listenAddr[1:] // Remove the leading ":"
+	}
+
+	// For addresses with host:port format
+	if strings.Contains(listenAddr, ":") {
+		parts := strings.Split(listenAddr, ":")
+		return parts[len(parts)-1] // Return the last part (port)
+	}
+
+	return ""
+}
+
 func extractHostname(urlStr string) (string, error) {
 	if !strings.HasPrefix(urlStr, "http://") && !strings.HasPrefix(urlStr, "https://") {
 		urlStr = "https://" + urlStr