refactor(web-app-desktop, web-app-discourse): improve initialization handling and HTTP readiness check

- Added HTTP readiness check for Desktop application to ensure all logos can be downloaded during initialization
- Introduced 'http_port' variable for better readability
- Simplified role execution structure by moving run_once inclusion into core task file
- Adjusted docker compose handler flushing behavior
- Applied consistent structure to Discourse role

See: https://chatgpt.com/share/68ed02aa-b44c-800f-a125-de8600b102d4

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

@@ -17,6 +17,8 @@
 - name: "load docker, proxy for '{{ application_id }}'"
   include_role:
     name: sys-stk-full-stateless
+  vars:
+    docker_compose_flush_handlers: false
 
 - name: "Check if host-specific config.yaml exists in {{ DESKTOP_CONFIG_INV_PATH }}"
   stat:
@@ -57,8 +59,16 @@
   notify: docker compose up
   when: not config_file.stat.exists
 
-- name: add docker-compose.yml
-  template:
-    src:  docker-compose.yml.j2 
-    dest: "{{ docker_compose.directories.instance }}docker-compose.yml"
-  notify: docker compose up
+- name: "Flush docker compose handlers"
+  meta: flush_handlers
+
+- name: Wait for Desktop HTTP endpoint (required so all logos can be downloaded during initialization)
+  uri:
+    url: "http://127.0.0.1:{{ http_port }}/"
+    status_code: 200
+  register: desktop_http
+  retries: 60
+  delay: 5
+  until: desktop_http.status == 200
+
+- include_tasks: utils/run_once.yml

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

@@ -1,5 +1,3 @@
 ---
-- block:
-    - include_tasks: 01_core.yml
-    - include_tasks: utils/run_once.yml
+- include_tasks: 01_core.yml  
   when: run_once_web_app_desktop is not defined

roles/web-app-desktop/vars/main.yml

@@ -1,5 +1,6 @@
 # General
 application_id:                   "web-app-desktop"
+http_port:                        "{{ ports.localhost.http[application_id] }}"
 
 ## Webserver
 proxy_extra_configuration:        "{{ lookup('template', 'nginx/sso.html.conf.j2') }}"