Added SVR.JS updater

updater.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+##Print splash
+echo '****************************'
+echo '**SVR.JS updater for Linux**'
+echo '****************************'
+echo
+
+##Check if user is root
+if [ "$(id -u)" != "0" ]; then
+  echo 'You need to have root privileges to update SVR.JS'
+  exit 1
+fi
+
+##Check if svrjs.zip exists
+if ! [ -f svrjs.zip ]; then
+  echo 'Can'"'"'t find SVR.JS archive in "svrjs.zip"! Make sure to download SVR.JS archive file from https://svrjs.org and rename it to "svrjs.zip".'
+  exit 1
+fi
+
+##Check if SVR.JS is installed
+if ! [ -d /usr/lib/svrjs ]; then
+  echo 'SVR.JS isn'"'"'t installed (or it'"'"'s installed without using SVR.JS installer)!'
+  exit 1
+fi
+
+##Copy SVR.JS files
+echo "Copying SVR.JS files..."
+unzip svrjs.zip -d /usr/lib/svrjs svr.compressed modules.compressed svr.js > /dev/null
+pushd .
+cd /usr/lib/svrjs
+node svr.js > /dev/null
+popd
+
+echo "Done! SVR.JS is updated successfully!"