Every hotel must provide itself with a safe depository for the valuable articles belonging to its guests, and must keep displayed on the inner face of the main entrance door in each sleeping room occupied by its guests or in any other conspicuous place in the sleeping room, and in the lobby of the hotel, written or printed notice to its guests that they must leave their valuables with the hotel, its clerk or agent for safekeeping in the safe depository, and of the limitations of liability provided for in Section 34-15-13.