diff --git a/.domains b/.domains
new file mode 100644
index 0000000..d18b449
--- /dev/null
+++ b/.domains
@@ -0,0 +1,5 @@
+# See https://docs.codeberg.org/codeberg-pages/using-custom-domain/ for
+# details. The first domain should be "main" the rest are aliases.
+
+openpgp.dev
+openpgp.codeberg.page