enh(shopware): improve healthchecks and proxy configuration

Removed obsolete EXPOSE/healthcheck from Dockerfile and added robust service-specific healthchecks:

- web: HTTP robots.txt check

- worker/scheduler: php -v runtime check

- opensearch: cluster health API check

Added TRUSTED_PROXIES=* for proxy-aware headers and centralized OPENSEARCH_PORT in vars.

Context: discussed implementation details in ChatGPT conversation on 2025-11-06 — https://chatgpt.com/share/690c9fb3-79f4-800f-bbdf-ea370c8f142c

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

@@ -42,9 +42,13 @@ x-environment: &shopware
     depends_on:
       init:
         condition: service_completed_successfully
-{% filter indent(4) %}
-    {% include 'roles/docker-container/templates/healthcheck/http.yml.j2' %}
-{% endfilter %}
+    healthcheck:
+      test: ["CMD-SHELL", "wget -q --spider http://127.0.0.1:{{ container_port }}/robots.txt || wget -q --spider http://127.0.0.1:{{ container_port }}/ || exit 1"]
+      interval: 30s
+      timeout: 5s
+      retries: 10
+      start_period: 120s
+
 
 {% include 'roles/docker-container/templates/networks.yml.j2' %}
 
@@ -64,6 +68,12 @@ x-environment: &shopware
 # @todo Activate for swarm deploy
 #    deploy:
 #      replicas: {{ SHOPWARE_WORKER_REPLICAS }}
+    healthcheck:
+      test: ["CMD", "php", "-v"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
 
 {% include 'roles/docker-container/templates/networks.yml.j2' %}
 
@@ -80,6 +90,13 @@ x-environment: &shopware
     depends_on:
       init:
         condition: service_completed_successfully
+    healthcheck:
+      test: ["CMD", "php", "-v"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 10s
+
 
 {% include 'roles/docker-container/templates/networks.yml.j2' %}
 
@@ -99,6 +116,12 @@ x-environment: &shopware
     depends_on:
       init:
         condition: service_completed_successfully
+    healthcheck:
+      test: ["CMD-SHELL", "curl -fsSL http://127.0.0.1:{{ SHOPWARE_OPENSEARCH_PORT }}/_cluster/health || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      start_period: 60s
 {% include 'roles/docker-container/templates/networks.yml.j2' %}
 {% endif %}