Update build.sh to allow build for development

build.sh

 #!/bin/bash
-cd /var/www/rocket.chat
+
+ROOTPATH=/var/www/rocket.chat
+PM2FILE=pm2.json
+if [ $1="development" ]; then
+  ROOTPATH=/var/www/rocket.chat.dev
+  PM2FILE=pm2.dev.json
+
+cd $ROOTPATH
 curl -fSL "https://s3.amazonaws.com/rocketchatbuild/demo.rocket.chat-v.latest.tgz" -o rocket.chat.tgz
 tar zxvf rocket.chat.tgz  &&  rm rocket.chat.tgz
-cd /var/www/rocket.chat/bundle/programs/server
+cd $ROOTPATH/bundle/programs/server
 npm install
-cd /var/www/rocket.chat/current
-pm2 startOrRestart /var/www/rocket.chat/current/pm2.json
+pm2 startOrRestart $ROOTPATH/current/$PM2JSON