increase container memory and shm to 20G (#3475)
increase container memory and shm to 20G (#3475)

* increase container memory and shm to 20G

* variables are POWERFUL

robertnishihara/ray,ray-project/ray,pcmoritz/ray-1,atumanov/ray,atumanov/ray,richardliaw/ray,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,richardliaw/ray,pcmoritz/ray-1,stephanie-wang/ray,ujvl/ray-ng,stephanie-wang/ray,robertnishihara/ray,pcmoritz/ray-1,robertnishihara/ray,pcmoritz/ray-1,ray-project/ray,stephanie-wang/ray,stephanie-wang/ray,atumanov/ray,richardliaw/ray,robertnishihara/ray,stephanie-wang/ray,robertnishihara/ray,atumanov/ray,atumanov/ray,ujvl/ray-ng,ray-project/ray,pcmoritz/ray-1,ray-project/ray,atumanov/ray,pcmoritz/ray-1,ray-project/ray,robertnishihara/ray,ujvl/ray-ng,richardliaw/ray,atumanov/ray,pcmoritz/ray-1,pcmoritz/ray-1,robertnishihara/ray,ujvl/ray-ng,stephanie-wang/ray,atumanov/ray,ray-project/ray,richardliaw/ray,richardliaw/ray,stephanie-wang/ray,ray-project/ray,robertnishihara/ray,ray-project/ray,stephanie-wang/ray,richardliaw/ray