Docker cannot open php.ini "/usr/local/etc/php" for writing - php

Question

My Dockerfile builds the PHP container seemingly without errors and all added PHP extensions are loaded Additional .ini files parsed. But when looking at the output during the build I see this:
#10 71.97 Build process completed successfully
#10 71.97 Installing '/usr/local/lib/php/extensions/no-debug-non-zts-20220829/xdebug.so'
#10 71.98 install ok: channel://pecl.php.net/xdebug-3.2.0
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=imagick.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=imagick.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=redis.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=imagick.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=redis.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "extension=memcached.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20220829/xdebug.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20220829/xdebug.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20220829/xdebug.so" to php.ini
#10 71.98 cannot open php.ini "/usr/local/etc/php" for writing
#10 71.98 You should add "zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20220829/xdebug.so" to php.ini
#10 72.05 fetch https://dl-cdn.alpinelinux.org/alpine/v3.17/main/x86_64/APKINDEX.tar.gz
#10 72.32 fetch https://dl-cdn.alpinelinux.org/alpine/v3.17/community/x86_64/APKINDEX.tar.gz
#10 72.54 (1/1) Installing .docker-php-ext-enable-deps (20230202.070642)
#10 72.55 OK: 459 MiB in 136 packages
#10 72.84 (1/1) Purging .docker-php-ext-enable-deps (20230202.070642)
#10 72.84 OK: 459 MiB in 135 packages
Should I just ignore it or is there some way to fix it?
The Dockerfile:
FROM php:8.2-fpm-alpine
RUN pear config-set php_ini "$PHP_INI_DIR"
RUN apk update && apk upgrade && apk add --no-cache $PHPIZE_DEPS libzip-dev zlib-dev gmp-dev libmemcached-dev linux-headers imagemagick-dev libpng-dev libwebp-dev libjpeg-turbo-dev freetype-dev \
&& docker-php-ext-configure gd --enable-gd --with-freetype --with-jpeg --with-webp \
&& docker-php-ext-install gd gmp pdo_mysql opcache zip
# I have tried adding this and still I get the same error
# php.ini will in this case be owned by `root` in the container
# If I add the user "docker" and let that user own the file I get the same error
RUN cp /usr/local/etc/php/php.ini-development /usr/local/etc/php/php.ini
RUN pecl install imagick redis memcached xdebug \
&& docker-php-ext-enable imagick redis memcached xdebug
COPY ./xdebug/xdebug.ini /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
RUN addgroup -g 1000 docker && adduser -D -u 1000 -G docker -s /bin/sh docker
USER docker
Relevant screenshots: