nginx: Reduce number of rotated logs kept around

configuration/default.nix

@@ -153,7 +153,12 @@
   services.logrotate = {
     enable = true;
 
-    settings = lib.mapAttrs' (virtualHost: _:
+    settings =
+      {
+        # Override the default, just keep fewer logs
+        nginx.rotate = 6;
+      }
+      // lib.mapAttrs' (virtualHost: _:
         lib.nameValuePair "/var/log/nginx/${virtualHost}/access.log" {
           frequency = "daily";
           rotate = 2;