Deploy script from post-receive with nvm

deploy.sh

#!/bin/bash

set -u
set -e

export NVM_DIR="$HOME/.nvm"
. "$NVM_DIR/nvm.sh"

target_branch="master"
working_tree=""

while read oldrev newrev refname
do
    branch=$(git rev-parse --symbolic --abbrev-ref $refname)
    if [ -n "$branch" ] && [ "$target_branch" == "$branch" ]; then

       GIT_WORK_TREE=$working_tree git checkout $target_branch -f
       NOW=$(date +"%Y%m%d-%H%M")
       git tag release_$NOW $target_branch
       cd $working_tree  && npm install && npm run build && forever restartall
       echo "   /==============================="
       echo "   | DEPLOYMENT COMPLETED"
       echo "   | Target branch: $target_branch"
       echo "   | Target folder: $working_tree"
       echo "   | Tag name     : release_$NOW"
       echo "   \=============================="
    fi
done