feat(magento): switch to ghcr.io/alexcheng1982/docker-magento2:2.4.6-p3; update Compose/Env/Tasks/Docs

• Docs: updated to MAGENTO_VOLUME; removed Installation/User_Administration guides
• Compose: volume path → /var/www/html; switched variables to MAGENTO_*/MYSQL_*/OPENSEARCH_*
• Env: new variable set + APACHE_SERVERNAME
• Task: setup:install via docker compose exec (multiline form)
• Schema: removed obsolete credentials definition
Link: https://chatgpt.com/share/68b8dc30-361c-800f-aa69-88df514cb160

roles/web-app-magento/tasks/01_core.yml

@@ -1,6 +1,32 @@
 - name: "load docker, db/redis/proxy for {{ application_id }}"
   include_role:
     name: sys-stk-full-stateful
+  vars:
+    docker_compose_flush_handlers:  true
 
-- name: flush docker service
-  meta: flush_handlers
+- name: "Run Magento setup:install (in container)"
+  command: >
+    docker compose exec -T application bash -lc "
+    cd /var/www/html && bin/magento setup:install \
+      --base-url='{{ MAGENTO_URL }}/' \
+      --db-host=\"$MYSQL_HOST\" \
+      --db-name=\"$MYSQL_DATABASE\" \
+      --db-user=\"$MYSQL_USER\" \
+      --db-password=\"$MYSQL_PASSWORD\" \
+      --search-engine='opensearch' \
+      --opensearch-host=\"$OPENSEARCH_HOST\" \
+      --opensearch-port=\"$OPENSEARCH_PORT_NUMBER\" \
+      --admin-firstname=\"$MAGENTO_ADMIN_FIRSTNAME\" \
+      --admin-lastname=\"$MAGENTO_ADMIN_LASTNAME\" \
+      --admin-email=\"$MAGENTO_ADMIN_EMAIL\" \
+      --admin-user=\"$MAGENTO_ADMIN_USERNAME\" \
+      --admin-password=\"$MAGENTO_ADMIN_PASSWORD\""
+  args:
+    chdir: "{{ docker_compose.directories.instance }}"
+  register: magento_install
+  changed_when: >
+    (magento_install.stdout is defined and
+     ('Magento installation complete' in magento_install.stdout
+      or 'successfully installed' in magento_install.stdout))
+
+- include_tasks: utils/run_once.yml

roles/web-app-magento/tasks/main.yml

@@ -2,8 +2,3 @@
 - name: "construct {{ role_name }}"
   include_tasks: 01_core.yml
   when: run_once_web_app_magento is not defined
-
-- name: run the docker magento tasks once
-  set_fact:
-    run_once_web_app_magento: true
-  when: run_once_web_app_magento is not defined