Let's say there is a config.xml file outside the chart directory. Can this file be copied to a directory inside the container?

If its inside the chart directory, its pretty easy to use configMap as in

{{ (tpl (.Files.Glob "myconf/*").AsConfig . ) | indent 2 }}

Since the file is outside chart directory its not supported in helm2(although there is some talk of supporting in helm3).

Thought of putting as in

key: |
  <tag>abc</tag>

Then read in the configMap and put as file.

Is there any elgant way to do it?