fix: use registry from docker-compose file for image deployment

The playbook was using docker_registry (registry.michaelschiemer.de) but
docker-compose.staging.yml uses git.michaelschiemer.de:5000. Now the playbook:
- Extracts the actual registry URL from docker-compose files
- Uses that registry for deploy_image
- Updates docker-compose file with the correct registry

This ensures the image is pulled from and deployed to the correct registry.

deployment/ansible/playbooks/deploy-image.yml

@@ -41,9 +41,24 @@
       ansible.builtin.set_fact:
         app_name: "{{ app_name if (app_name is defined and app_name != '') else app_name_default }}"
 
-    - name: Set deploy_image from registry, app_name and tag
+    - name: Extract registry URL from docker-compose file (for image deployment)
+      ansible.builtin.shell: |
+        cd {{ application_code_dest }}
+        grep -h "image:" docker-compose.base.yml docker-compose.{{ application_compose_suffix }} 2>/dev/null | \
+        grep -E "{{ app_name }}" | head -1 | \
+        sed -E 's/.*image:\s*([^\/]+).*/\1/' | \
+        sed -E 's/\/.*$//' || echo "{{ docker_registry }}"
+      register: compose_registry_url
+      changed_when: false
+      failed_when: false
+
+    - name: Set actual registry from compose file or use default
       ansible.builtin.set_fact:
-        deploy_image: "{{ docker_registry }}/{{ app_name }}:{{ image_tag }}"
+        actual_registry: "{{ (compose_registry_url.stdout | trim) if (compose_registry_url.stdout | trim != '' and compose_registry_url.stdout | trim != docker_registry) else docker_registry }}"
+
+    - name: Set deploy_image from actual registry, app_name and tag
+      ansible.builtin.set_fact:
+        deploy_image: "{{ actual_registry }}/{{ app_name }}:{{ image_tag }}"
 
     - name: Set database and MinIO variables from vault or defaults
       ansible.builtin.set_fact:
@@ -123,21 +138,22 @@
     - name: Update docker-compose file with new image tag
       ansible.builtin.replace:
         path: "{{ application_code_dest }}/docker-compose.{{ application_compose_suffix }}"
-        regexp: '^(\s+image:\s+)({{ docker_registry }}/{{ app_name }}:)(.*)$'
+        regexp: '^(\s+image:\s+)({{ actual_registry }}/{{ app_name }}:)(.*)$'
         replace: '\1\2{{ image_tag }}'
       register: compose_update_result
       failed_when: false
       changed_when: compose_update_result.changed | default(false)
 
-    - name: Update docker-compose file with new image (alternative pattern)
+    - name: Update docker-compose file with new image (alternative pattern - any registry)
       ansible.builtin.replace:
         path: "{{ application_code_dest }}/docker-compose.{{ application_compose_suffix }}"
-        regexp: 'image:\s+{{ docker_registry }}/{{ app_name }}:.*'
-        replace: 'image: {{ deploy_image }}'
+        regexp: '^(\s+image:\s+)([^\/]+\/{{ app_name }}:)(.*)$'
+        replace: '\1{{ actual_registry }}/{{ app_name }}:{{ image_tag }}'
       register: compose_update_alt
       when: compose_update_result.changed == false
       failed_when: false
       changed_when: compose_update_alt.changed | default(false)
+      changed_when: compose_update_alt.changed | default(false)
 
     - name: Ensure Docker networks exist
       community.docker.docker_network: