fix: nil pointer when sonyflake is not properly configured

internal/server/server.go

@@ -17,6 +17,7 @@ import (
 	"github.com/jsiebens/ionscale/internal/service"
 	"github.com/jsiebens/ionscale/internal/stunserver"
 	"github.com/jsiebens/ionscale/internal/templates"
+	"github.com/jsiebens/ionscale/internal/util"
 	"github.com/labstack/echo-contrib/echoprometheus"
 	"github.com/labstack/echo-contrib/pprof"
 	"github.com/labstack/echo/v4"
@@ -53,6 +54,8 @@ func Start(ctx context.Context, c *config.Config) error {
 		return err
 	}
 
+	util.EnsureIDProvider()
+
 	derpMap, err := derp.LoadDERPSources(c)
 	if err != nil {
 		logger.Warn("not all derp sources are read successfully", zap.Error(err))