#3 Make PHP version configurable, default to 7.4

test-and-deploy.yml

+variables:
+  PHP_VERSION: 7.4
+
 stages:
   - validation
   - buildprod
@@ -66,6 +69,7 @@ stages:
   stage: validation
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -113,6 +117,7 @@ stages:
   stage: buildprod
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   cache:
     <<: *cache_prod
     policy: pull-push
@@ -148,6 +153,7 @@ stages:
   stage: build
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   cache:
     <<: *cache_default
     policy: pull-push
@@ -220,6 +226,7 @@ stages:
   stage: prepare
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -250,6 +257,7 @@ stages:
   stage: prepare
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -276,6 +284,7 @@ stages:
   stage: prepare
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script:
@@ -301,6 +310,7 @@ stages:
   stage: test
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -329,6 +339,7 @@ stages:
   stage: test
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -361,6 +372,7 @@ stages:
   stage: test
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |
@@ -392,6 +404,7 @@ stages:
   stage: test
   tags:
     - default
+  image: registry.lakedrops.com/docker/gitlab-drupal-ci:php-${PHP_VERSION}
   variables:
     GIT_STRATEGY: none
   script: |