Update Dockerfile

[hemeda3]

shows error when it pull from node:8-alpine , ---> Running in 6d7528c304db npm ERR! code ENOGIT npm ERR! No git binary found in $PATH npm ERR! npm ERR! Failed using git. npm ERR! Please check if you have git installed and in your PATH. npm ERR! A complete log of this run can be found in: npm ERR! /root/.npm/_logs/2018-01-25T05_03_11_702Z-debug.log

I updated it with node:carbon-alpine and it's work now! ref -- 8.9.4, 8.9, 8, carbon (8/Dockerfile)