Fix: Replace unsupported /dev/tcp healthcheck with onboard PHP socket check for websocket service

Replaced the previous shell-based /dev/tcp healthcheck with a PHP fsockopen() test to ensure compatibility with minimal base images. This avoids dependency on missing tools like nc or curl and provides a reliable onboard check.

Conversation: https://chatgpt.com/share/68deb8ec-d920-800f-bd35-2869544fe30f

roles/web-app-espocrm/templates/docker-compose.yml.j2

@@ -65,7 +65,7 @@
       {{ ESPOCRM_SERVICE }}:
         condition: service_healthy
     healthcheck:
-      test: ["CMD", "sh", "-c", "exec 3<>/dev/tcp/127.0.0.1/8080 && echo 'OK' && exec 3<&- 3>&-"]
+      test: ["CMD", "php", "-r", "($s=@fsockopen('127.0.0.1',8080,$e,$E,2))?fclose($s):exit(1);"]
       interval: 30s
       timeout: 5s
       retries: 5