install nodejs from nodesource rather than EPEL
install nodejs from nodesource rather than EPEL

tbretl/PrairieLearn,parasgithub/PrairieLearn,lotrfan/PrairieLearn,parasgithub/PrairieLearn,parasgithub/PrairieLearn,kevinwang/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,jakebailey/PrairieLearn,kevinwang/PrairieLearn,tbretl/PrairieLearn,mwest1066/PrairieLearn,parasgithub/PrairieLearn,lotrfan/PrairieLearn,jakebailey/PrairieLearn,lotrfan/PrairieLearn,PrairieLearn/PrairieLearnHack,rbessick5/PrairieLearn,kevinwang/PrairieLearn,PrairieLearn/PrairieLearnHack,kevinwang/PrairieLearn,rbessick5/PrairieLearn,mwest1066/PrairieLearn,PrairieLearn/PrairieLearnHack,mwest1066/PrairieLearn,parasgithub/PrairieLearn,lotrfan/PrairieLearn,rbessick5/PrairieLearn,lotrfan/PrairieLearn,tbretl/PrairieLearn,lotrfan/PrairieLearn,jakebailey/PrairieLearn,kevinwang/PrairieLearn,mwest1066/PrairieLearn,PrairieLearn/PrairieLearnHack,tbretl/PrairieLearn,kevinwang/PrairieLearn,kevinwang/PrairieLearn,jakebailey/PrairieLearn,mwest1066/PrairieLearn,tbretl/PrairieLearn,rbessick5/PrairieLearn,lotrfan/PrairieLearn