Configure additional assets output path in angular.json.

frontend/angular.json

@@ -30,6 +30,11 @@
                 "glob": "**/*",
                 "input": "public",
                 "output": "public"
+              },
+              {
+                "glob": "**/*",
+                "input": "public",
+                "output": "assets"
               }
             ],
             "styles": [