ci: deploy on froggit pages

.gitlab-ci.yml

-image: alpine:latest
+image: cimg/php:8.2
+
+cache:
+  paths:
+  - composer-cache/
+  - vendor/
+  - .cache/
+
+before_script:
+- |
+  echo "Downloading Cecil..."
+  if [[ -z "$CECIL_VERSION" ]]; then
+    curl -sSOL https://cecil.app/cecil.phar
+  else
+    curl -sSOL https://cecil.app/download/$CECIL_VERSION/cecil.phar
+  fi
+- php cecil.phar --version
+- COMPOSER_CACHE_DIR=composer-cache composer install --prefer-dist --no-dev --no-progress --no-interaction
+
+test:
+  stage: test
+  tags:
+    - cache
+  script:
+  - php cecil.phar build --verbose --output=test
+  artifacts:
+    paths:
+      - test
+  rules:
+    - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH
 
 pages:
   stage: deploy
+  tags:
+    - cache
   script:
-    - echo 'Nothing to do...'
+    - php cecil.phar build --output=public
   artifacts:
     paths:
-    - public
+      - public
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH