Strip tags out of og:description for Facebook (#100)

This is a good solution - NPM dependency creep is real but not much we can do about it.
Strip tags out of og:description for Facebook with strip-tags

Author: AaronC81

main.js

@@ -8,6 +8,7 @@ const Markdown = new require('markdown-it')({
     typographer: true // have some nice pretty quotes
 }).use(require('markdown-it-highlightjs'), {auto: true, code: false})
 const exec = require('child_process').exec;
+require("handlebars-helpers")();
 
 function cmd(command) {
     return new Promise((resolve,reject) => {