Use zap logger instead of log package

cmd/infohub/main.go

@@ -161,7 +161,7 @@ func main() {
 	if cfg.Auth.Enabled {
 		m, err := auth.NewMiddleware(cfg.Auth.JwkURL, cfg.Auth.RefreshInterval, httpClient)
 		if err != nil {
-			log.Fatalf("failed to create authentication middleware: %v", err)
+			logger.Fatal("failed to create authentication middleware", zap.Error(err))
 		}
 		infohubServer.Use(m.Handler())
 	}