Add publicUrl as configuration item

server/app.js

@@ -264,6 +264,7 @@ const templateFn = require('./../client/template.js');
 app.use((req, res)=>{
 	const props = {
 		version     : require('./../package.json').version,
+		publicUrl   : config.get('publicUrl'),
 		url         : req.originalUrl,
 		brew        : req.brew,
 		brews       : req.brews,