[upd] update dockerfile

build/docker/phpunit/Dockerfile

-FROM alpine as downloader
+FROM alpine:20220715 as downloader
+
 RUN apk add --no-cache \
 ca-certificates=20220614-r2 \
 wget=1.21.3-r2
+
 WORKDIR /tmp
+
 RUN wget -q https://phar.phpunit.de/phpunit-9.phar -O phpunit \
 && wget -q https://squizlabs.github.io/PHP_CodeSniffer/phpcs.phar -O phpcs \
 && wget -q https://phpmd.org/static/latest/phpmd.phar -O phpmd
+
 FROM php:8.0-cli
+
 COPY --from=downloader /tmp/php* /usr/local/bin/
+
 WORKDIR /usr/local/bin/
+
 RUN chmod +x phpunit phpcs phpmd
+
 WORKDIR /usr/local/etc/php/conf.d/
+
 RUN pecl install xdebug \
 && echo "zend_extension=$(find /usr/local/lib/php/extensions/ -name xdebug.so)" > xdebug.ini \
 && echo "xdebug.mode=debug" >> xdebug.ini \
 && echo "xdebug.remote_autostart=off" >> xdebug.ini
+
 ENV XDEBUG_MODE=coverage
+
 WORKDIR /app
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