add Metric

internal/services/db_updater/main.go

@@ -5,8 +5,11 @@ import (
 	"github.com/rs/zerolog/log"
 	"thuanle.me/ip-info/configs"
 	"thuanle.me/ip-info/internal/data"
+	"time"
 )
 
+var DbUpdatedAt time.Time
+
 func StartUpdateDbService() {
 	c := cron.New()
 	_, _ = c.AddFunc("@daily", fetchDbs)
@@ -29,5 +32,7 @@ func fetchDbs() {
 			log.Err(err).Msg("Failed to reload mmdb")
 			return
 		}
+
+		DbUpdatedAt = time.Now()
 	}
 }