[ADM] adding files to install or using the repl.

install

+#!/bin/bash
+
+echo "Upgrading nodeJS"
+sudo npm cache clean -f
+sudo npm install -g n
+sudo n stable
+sudo n latest
+
+echo "Installing yarn"
+curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt update
+sudo apt install yarn
+
+./build
+

repl

+#!/bin/bash
+pulp --psc-package repl