build PHP 8 images

Author: schmunk42

.env-dist

@@ -2,4 +2,4 @@ PHP_IMAGE_NAME=local/dmstr/php-yii2
 PHP_IMAGE_VERSION=latest
 GITHUB_API_TOKEN=0000000000000000000000000000000000000000
 
-PHP_BASE_IMAGE_VERSION=7.4
+PHP_BASE_IMAGE_VERSION=8.0

.gitlab-ci.yml

@@ -13,7 +13,7 @@ variables:
 before_script:
  - export ISOLATION=buildpipeline${CI_PIPELINE_ID}
  - export COMPOSE_PROJECT_NAME=${ISOLATION}${CI_BUILD_NAME}
- - export PHP_BASE_IMAGE_VERSION=7.4
+ - export PHP_BASE_IMAGE_VERSION=8.0
  - export PHP_IMAGE_VERSION=$(git describe --always --dirty --tags)
  - export STACK_PHP_IMAGE=${PHP_IMAGE_NAME}:${PHP_IMAGE_VERSION}
  - export REGISTRY_PHP_IMAGE=${PHP_IMAGE_NAME}:${CI_BUILD_REF_NAME}

README.md

@@ -17,7 +17,9 @@ Changelog
 
 ### 8.x
 
-- using updated yii2 images, different system package installation
+- using updated yii2 images
+ - different system package installation
+ - composer 2
 
 ### 7.x