Documentation on Mix.install based release is misleading

[narslan]

The README states that the scripts are copied to <release_dir>,
but the task appears to remove the directory contents before copying.
Is this intended behavior?

Specifically, this sentence seems incorrect:
"This copies language server and debugger adapter launch scripts to the <release_dir> and includes a VERSION manifest file."

Reproduction:

mkdir /tmp/test_release                                                                              1 ↵
touch /tmp/test_release/important_file
MIX_ENV=prod mix elixir_ls.release2 -o /tmp/test_release
ls /tmp/test_release

Expected behavior: the file important_file should remain.
Observed behavior: the directory is cleared before the scripts are copied.