fix: Correct Jinja2 logic for merging insecure registry config

- Fix dictionary update logic in set_fact
- Use list operations before updating dictionary
- Ensures proper JSON structure for Docker daemon.json

deployment/ansible/playbooks/deploy-image.yml

@@ -196,12 +196,11 @@
       set_fact:
         docker_daemon_config_merged: >-
           {%- set config = docker_daemon_config_dict.copy() -%}
-          {%- if 'insecure-registries' not in config -%}
-            {%- set _ = config.update({'insecure-registries': []}) -%}
-          {%- endif -%}
-          {%- if 'git.michaelschiemer.de:5000' not in config['insecure-registries'] -%}
-            {%- set _ = config['insecure-registries'].append('git.michaelschiemer.de:5000') -%}
+          {%- set existing_registries = config.get('insecure-registries', []) | list -%}
+          {%- if 'git.michaelschiemer.de:5000' not in existing_registries -%}
+            {%- set _ = existing_registries.append('git.michaelschiemer.de:5000') -%}
           {%- endif -%}
+          {%- set _ = config.update({'insecure-registries': existing_registries}) -%}
           {{ config }}
 
     - name: Update Docker daemon.json with insecure registry