Do not serve the frontend for unknown API URLs

arkindex/project/urls.py

@@ -60,5 +60,7 @@ if settings.DEBUG:
 
 # Add index.html using CDN assets
 # It's served as a full fallback on 404 to support loading specific frontend urls
+# The (?!api/) in the regex makes sure that any URL starting in api/ will not match this regex, so it will cause a 404,
+# but everything else redirects to index.html; this avoids getting the frontend as a response to an incorrect API URL.
 if settings.CDN_ASSETS_URL is not None:
-    urlpatterns.append(re_path(r'^.*$', CdnHome.as_view(), name="home"))
+    urlpatterns.append(re_path(r'^(?!api/).*$', CdnHome.as_view(), name="home"))