#nosec G304 ReadFile returns the raw content of a file.

StartTimeStampUpdater starts a concurrent function which stores the timestamp to an atomic value per second, which is much better for performance than determining it at runtime each time.

Walk walks the filesystem rooted at root, calling walkFn for each file or directory in the filesystem, including root.

Timestamp please start the timer function before you use this value please load the value with atomic `atomic.LoadUint32(&utils.Timestamp)`.