Pin versions of major components

variables:

  WORDPRESS_VERSION:

    value: 5.8.1

    description: WordPress release

  PHP_VERSION:

    value: 8.0.0

    description: PHP release to build into the backend image

  NGINX_VERSION:

    value: 1.21.3

    description: Nginx release for the frontend image

.changes: &change-files

  changes:

  - .gitlab-ci.yml

    --local context=.

    --local dockerfile=.

    --opt target=${TARGET}

    ${NGINX_VERSION:+--opt build-arg:nginx_version=$NGINX_VERSION}

    ${PHP_VERSION:+--opt build-arg:php_version=$PHP_VERSION}

    ${WORDPRESS_VERSION:+--opt build-arg:wp_version=$WORDPRESS_VERSION}

    --opt build-arg:nginx_version=${NGINX_VERSION}

    --opt build-arg:php_version=${PHP_VERSION}

    --opt build-arg:wp_version=${WORDPRESS_VERSION}

    --opt label:nginx.version=${NGINX_VERSION}

    --opt label:php.version=${PHP_VERSION}

    --opt label:wordpress.version=${WORDPRESS_VERSION}

    --output type=image,name=${BUILD_TAG},push=true