Add backup before deploy

Author: paivaric

deploy-prod.sh

@@ -5,10 +5,11 @@ if [[ ! $b4a_certs_path ]]; then echo 'Set b4a_certs_path environment variable,
 host=52.0.232.94
 user=ubuntu
 pem=Back4App_Production.pem
+now=`date '+%Y%m%d%H%M%S'`
 
 branch=master
 git='~/bin/git-parse-dashboard'
-ssh -t -i $b4a_certs_path/$pem $user@$host "sudo su back4app -c '. ~/.nvm/nvm.sh && nvm use 9 && cd ~/scm/parse-dashboard && $git reset --hard && $git remote update && $git checkout $branch && $git merge origin/$branch && yarn install --production=false && npm run prepublish && npm run build'"
+ssh -t -i $b4a_certs_path/$pem $user@$host "sudo su back4app -c 'cp -r ~/scm/parse-dashboard ~/scm/parse-dashboard-$now && . ~/.nvm/nvm.sh && nvm use 9 && cd ~/scm/parse-dashboard && $git reset --hard && $git remote update && $git checkout $branch && $git merge origin/$branch && yarn install --production=false && npm run prepublish && npm run build'"
 curl -X DELETE "https://api.cloudflare.com/client/v4/zones/69ace06909c83213745231d2c6d0fd27/purge_cache" -H "X-Auth-Email: $CF_EMAIL" -H "X-Auth-Key: $CF_KEY" -H "Content-Type: application/json" --data '{"files":[
   "https://parse-dashboard.back4app.com/bundles/dashboard.bundle.js",
   "https://parse-dashboard.back4app.com/bundles/PIG.bundle.js",