Can you put a Leopard Gecko in a Storage bin as its enclosure ?

Yes, as long as it is bigger than a shoe box.
A larger container, such as a 20 gallon is preferable. Leopard geckos are solitary animals and only come together in the wild to mate, so individual housing is best.
In order to properly digest their food, leopard geckos need a warm spot of 88-94F within the enclosure. Never use hot rocks for it can burn their stomachs.
The substrate in their vivariums does not need to be cleaned too often, as leopard geckos do not have bladders so their urates are solid. Never use wood chip or sand substrate this can become lodged in the digestive system blocking them from ingesting food and tearing through the lower digestive system. Even when using sand that is advertised as digestible there is a risk of impaction that could potentially kill a leopard gecko, but usually only at a younger age, or to the length of around 6 inches. Ideal substrates are paper towel, black and white newspaper, reptile carpet, shelf liner or for a natural look slate tile.
The water bowl needs to be cleaned daily to keep the water clean from algae, skin, and dead feeder insects. The most common method to help pet geckos shed their old skin, is to add a ‘humid hide’ into the vivarium. These are usually small dens with damp kitchen toweling, vermiculite or moss. Another, less manual way of helping pet geckos shed skin, is to add a piece of large bark, or another natural-looking, rough surfaced ornament for the gecko to rub up against. If the skin doesn’t come all the way off their toes you should soak the feet in water and then try to gently roll it off with a cotton swab.
The Leopard Gecko is one of the most vocal creatures of its species and the noise it makes often is similar to the squirting of water. Do not be alarmed if you hear this noise, that the Lizard is sick is a common misconception due to the vocal nature of the Gecko.
Good luck!