Add apt update to intl intall
Add apt update to intl intall

Fixes #847

olegl-hyuna/laradock,edmundluong/laradock,jfoliveira/laradock,kolobai/laradock,hnquang112/laradock,macghriogair/laradock,jinnawat/laradock,arkadiusjonczek/laradock,emmac1016/laradock,ralphowino/laradock,Harmonic/laradock,macghriogair/laradock,Competa-IT/laradock,Harmonic/laradock,cjnchk/laradock,olin2011/laradock,hp9390/laradock,AliveCorpse/laradock,Harmonic/laradock,schiggi/laradock,NewbMiao/laradock,springjk/laradock,ydatech/yii2-laradock,AliveCorpse/laradock,schiggi/laradock,jcharlesworth/laradock,cjnchk/laradock,Competa-IT/laradock,olin2011/laradock,tharaxodia/laradock,bestlong/laradock,luciano-jr/laradock,kolobai/laradock,hp9390/laradock,vjekoslav/laradock,vjekoslav/laradock,tharaxodia/laradock,cjnchk/laradock,bestlong/laradock,zuohuadong/laradock,ralphowino/laradock,hnquang112/laradock,emmac1016/laradock,schiggi/laradock,hnquang112/laradock,zuohuadong/laradock,jcharlesworth/laradock,arkadiusjonczek/laradock,a-h-abid/laradock,bestlong/laradock,edmundluong/laradock,ancon/laradock,ralphowino/laradock,NewbMiao/laradock,olegl-hyuna/laradock,hnquang112/laradock,ralphowino/laradock,springjk/laradock,zuohuadong/laradock,bestlong/laradock,ancon/laradock,cjnchk/laradock,schiggi/laradock,arkadiusjonczek/laradock,luciano-jr/laradock,jinnawat/laradock,springjk/laradock,springjk/laradock,macghriogair/laradock,jinnawat/laradock,jfoliveira/laradock,NewbMiao/laradock,jinnawat/laradock,LaraDock/laradock,Harmonic/laradock,a-h-abid/laradock,arkadiusjonczek/laradock,vjekoslav/laradock,ydatech/yii2-laradock,edmundluong/laradock,zuohuadong/laradock,kolobai/laradock,bestlong/laradock