feat(roles): Add auto updating to some roles

Miniflux, searx, shaarli and wallabag will be automatically updated by
shepherd.

roles/searx/templates/docker-stack.yml.j2

@@ -13,7 +13,7 @@ services:
         start_period: 1m
     environment:
       - BIND_ADDRESS=0.0.0.0:8080
-{% if server_domain is not undefined and not none %}   
+{% if server_domain is not undefined and not none %}
       - "BASE_URL={{ (searx_use_https == True) | ternary('https', 'http') }}://{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}.{{server_domain}}"
 {% else %}
       - "BASE_URL={{ (searx_use_https == True) | ternary('https', 'http') }}://localhost/{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}"
@@ -21,6 +21,11 @@ services:
     volumes:
       - /etc/localtime:/etc/localtime:ro
       - data:/etc/searx:rw
+{% if searx_autoupdate is defined and searx_autoupdate %}
+    deploy:
+      labels:
+        - shepherd.autoupdate=true
+{% endif %}
 
 volumes:
   data: