Docker Enable Xdebug – Debian

I have such Dockerfile for my php-container:

FROM my-image/debian

ARG PHP_VERSION

...
...

RUN 
    set -eux 
    
    # INSTALL SURY SOURCES
    && buildDeps='apt-transport-https lsb-release wget' 
    && apt-get update 
    && apt-get install -y --no-install-recommends --no-install-suggests $buildDeps 
    && wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg 
    && echo "deb https://packages.sury.org/php/ buster main" > /etc/apt/sources.list.d/php.list 
    
    && update-ca-certificates 
    
    # INSTALL PHP PACKAGES
    && apt-get update 
    && apt-get install -y --no-install-recommends --no-install-suggests 
      php$PHP_VERSION 
      php$PHP_VERSION-cli 
      php$PHP_VERSION-fpm 
      php$PHP_VERSION-opcache 
      php$PHP_VERSION-redis 
      php$PHP_VERSION-apcu 
      php$PHP_VERSION-zip zip unzip 
      php$PHP_VERSION-curl 
      php$PHP_VERSION-gd 
      php$PHP_VERSION-intl 
      php$PHP_VERSION-mysql 
      php$PHP_VERSION-soap 
      php$PHP_VERSION-amqp 
      php$PHP_VERSION-bcmath 
      php$PHP_VERSION-socket 
      php$PHP_VERSION-dom 
      php$PHP_VERSION-mbstring 
      php-pear 
      php$PHP_VERSION-dev 
    && mkdir -p /var/run/ 
    
    # Install xdebug
    && pecl install xdebug 
    && docker-php-ext-enable xdebug 
    
    # CLEAN
    && apt-get clean 
    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $buildDeps 
    && rm -rf /var/lib/apt/lists/* 
    && rm -rf /var/cache/apt/archives/* 
    && rm -rf /tmp/* 
....
....
....

when I build it, i get error
/bin/sh: 1: docker-php-ext-enable: not found

I don’t want to get image from alpine or other external php image. Cause particular reasons, i want to build php and have an hand from my-image/debian.

Could someone help me activate xdebug? It is well installed (via the pecl) but when I do php -v it is not there, even after rebuild and restart of the containers

Thanks