reduce dockerfile layers to avoid buggy behavior.
reduce dockerfile layers to avoid buggy behavior.

JuliaLang/JuliaBox,tanmaykm/JuliaBox,gsd-ufal/Juliabox,JuliaLang/JuliaBox,EricForgy/JuliaBox,mdpradeep/JuliaBox,tanmaykm/JuliaBox,EricForgy/JuliaBox,mr-justin/JuliaBox,mdpradeep/JuliaBox,gsd-ufal/Juliabox,mr-justin/JuliaBox,mdpradeep/JuliaBox,mr-justin/JuliaBox,tanmaykm/JuliaBox,mdpradeep/JuliaBox,JuliaLang/JuliaBox,gsd-ufal/Juliabox,EricForgy/JuliaBox,mr-justin/JuliaBox,gsd-ufal/Juliabox,JuliaLang/JuliaBox,tanmaykm/JuliaBox,EricForgy/JuliaBox