👒 fix timezone to utc and perfect example demo

example/example.go

@@ -2,13 +2,18 @@ package main
 
 import (
 	"fmt"
+	"time"
 
 	"github.com/godruoyi/go-snowflake"
 )
 
 func main() {
+	// set starttime and machineID for the first time if you wan't to use the default value
+	snowflake.SetStartTime(time.Date(2021, 9, 1, 0, 0, 0, 0, time.UTC))
+	snowflake.SetMachineID(snowflake.PrivateIPToMachineID()) // testing, not to be used in production
+
 	id := snowflake.ID()
-	fmt.Println(id)
+	fmt.Println(id) // 1537200202186752
 
 	sid := snowflake.ParseID(id)
 	// SID {