feat(seo): add sitemap generator

cmd/indexer/main.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/prabhupadasays/spsays-bff/internal/config"
 	"github.com/prabhupadasays/spsays-bff/internal/repository"
+	"github.com/prabhupadasays/spsays-bff/pkg/revalidate"
 	"github.com/typesense/typesense-go/v2/typesense"
 	"github.com/typesense/typesense-go/v2/typesense/api"
 	"go.mongodb.org/mongo-driver/v2/bson"
@@ -191,6 +192,15 @@ func main() {
 	}
 
 	sugar.Info("=== Indexing complete ===")
+
+	// Content changed → refresh the frontend sitemap cache (synchronous: this
+	// CLI exits right after, so a background goroutine wouldn't run). No-op
+	// when FRONTEND_URL / REVALIDATE_SECRET are unset.
+	if err := revalidate.New(cfg.FrontendURL, cfg.RevalidateSecret, logger).TriggerSync("sitemap"); err != nil {
+		sugar.Warnf("sitemap revalidation ping failed: %v", err)
+	} else if cfg.RevalidateSecret != "" {
+		sugar.Info("sitemap revalidation pinged")
+	}
 }
 
 // importBatch imports documents into Typesense in batches of batchSize.