Merge pull request DSpace#4718 from DSpace/backport-4634-to-dspace-8_x

[Port dspace-8_x] server.ts: remove port and host fallbacks in run

Author: tdonohue

server.ts

@@ -561,8 +561,8 @@ function createHttpsServer(keys) {
  * Create an HTTP server with the configured port and host.
  */
 function run() {
-  const port = environment.ui.port || 4000;
-  const host = environment.ui.host || '/';
+  const port = environment.ui.port;
+  const host = environment.ui.host;
 
   // Start up the Node server
   const server = app();