Fix invalid URL being generated

lib/url.js

@@ -2,7 +2,9 @@ import queryString from 'query-string';
 import siteConfig from 'storage/site';
 
 export const prefixHost = (url) => {
-  return /^\//.test(url) ? `${siteConfig.url}${url}` : url;
+  // if it starts with forward slash then prefix site URL
+  // @todo proper handling of full URLs and trailing slashes
+  return /^\//.test(url) ? `${siteConfig.url.web}${url}` : url;
 };
 
 export const getTwitterUrl = (username) => {