Set canonical_url domain in settings

gallery/context_processors.py

@@ -0,0 +1,16 @@
+from django.conf import settings
+
+
+def canonical_url_processor(request):
+    if settings.DEBUG:
+        canonical_url = request.build_absolute_uri()
+    else:
+        current_host = request.get_host()
+        canonical_host = settings.CANONICAL_HOST
+
+        if current_host != canonical_host:
+            canonical_url = f"{request.scheme}://{canonical_host}{request.get_full_path()}"
+        else:
+            canonical_url = request.build_absolute_uri()
+
+    return {'canonical_url': canonical_url}