Fix pdf viewer when opening in docker.

Have envs for angular.

nginx.conf

@@ -17,6 +17,15 @@ http {
         # Serve Angular UI
         location / {
             try_files $uri $uri/ /index.html;  # Fallback to index.html for Angular routing
+
+            location ~* \.mjs$ {
+                # target only *.mjs files
+                # now we can safely override types since we are only
+                # targeting a single file extension.
+                types {
+                    text/javascript mjs;
+                }
+            }
         }
 
         # Proxy API requests that start with /api/ to the backend