Missing addon_config folder

I am making a addon.
This is my configuration.yaml:

---
name: Day Ahead Optimalisatie
version: "0.3.31"
slug: day_ahead_opt
description: Docker used by Home Assistant Community Add-ons for day ahead optimisations
url: https://github.com/corneel27/day-ahead/
arch:
  - aarch64
init: false
apparmor: true
legacy: true
map:
  - ssl:rw
  - addon_config:rw
  - share:rw
homeassistant_api: true
ports:
  5000/tcp: 5000

All works fine, but I am missing the folder addon_config in the working addon.
What am I doing wrong?
Thanx in advance

You might want to ask under Development in the HA Discord.