Add a method to fetch by domain

routes/sites.js

@@ -42,7 +42,7 @@ router.get('/:id', async function(req, res, next) {
  * 
  * Returns a specific site by its domain name in JSON format.
  */
-router.get('/:domain', async function(req, res, next) {
+router.get('/domain/:domain', async function(req, res, next) {
     const domainName = req.params.domain;
     let site = null;