[DSC-2281] Fix regex in order to exclude bitstream id

(cherry picked from commit 593e35c6290895f128d3b13f66a80c38c0279885)

Author: atarix83

server.ts

@@ -716,9 +716,10 @@ function healthCheck(req, res) {
 function redirectManifest(req, res) {
   console.info('Redirecting old manifest');
   const url = req.url;
-  const regex = /json\/iiif\/(.+?)\/manifest/;
+  const regex = /json\/iiif\/([^\/]+\/[^\/]+)(?:\/([^\/]+))?\/manifest/;
   const match = url.match(regex);
   let handle;
+  let id;
 
   if (match) {
     handle = match[1];