Document inability to override arrays in landofiles

[jdleonard]

Please complete the following:

Link to the page that needs to be updated or changed. https://docs.lando.dev/config/lando.html

Describe the change you'd like It would be helpful for any limitations to the ability to override landofiles to be spelled out. For example, if I have this in lando.yml:

services:
  appserver:
    run:
      - command1
      - command2

and this in lando.local.yml:

services:
  appserver:
    run:
      - command3
      - command4

I would expect only command3 and command4 to run, but all four commands are running.

@dustinleblanc said

I think we’re using _.merge to merge the data objects together, and I bet it just concats arrays

I'm not sure whether this is a bug or a documentation need.