fix: i really only need this once

tools/migration/domains-per-server.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+for s in servers/*; do
+    echo "$s uses these domains..."
+    for f in $s/docker-compose.d/custom/nginx/conf.d/*.conf; do
+        grep "server_name" $f | sed 's/^.*server_name//' | sed 's/;$//'
+    done
+done