Get current commit id of Git and update to package.json
"predev": "node ./node_modules/json/lib/json.js -I -f package.json -e \"this.commit='$(git rev-parse --short HEAD)'\"",
"predev": "node ./node_modules/json/lib/json.js -I -f package.json -e \"this.commit='$(git rev-parse --short HEAD)'\"",