With cargo ships unloading around the clock, workers at Hong Kong’s busiest port are forced to grab what little sleep they can during long shifts in makeshift dormitories crafted from containers.The conditions inside the windowless rooms are cramped, with as many as 20 workers sharing the space, making social distancing exceedingly difficult. No one has an assigned area, so they climb into whatever bunk bed happens to be free.Some are so exhausted they just sleep on the floor outside the…