Use .asf.yaml

As requested with https://lists.apache.org/thread.html/r8d023c0f5afefca7f6ce4e26d02404762bd6234fbe328011e1564249%40%3Cusers.infra.apache.org%3E
diff --git a/.asf.yaml b/.asf.yaml
new file mode 100644
index 0000000..a717f35
--- /dev/null
+++ b/.asf.yaml
@@ -0,0 +1,3 @@
+publish:
+   whoami: asf-site
+