feat(roles): Add auto updating to some roles

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

roles/miniflux/defaults/main.yml

@@ -8,6 +8,8 @@ miniflux_use_https: true
 # the subdomain link miniflux will be reachable under
 subdomain_alias: rss
 
+miniflux_autoupdate: true
+
 # Should ideally be overwritten in encrypted group/host vars
 miniflux_admin_username: myadmin
 miniflux_admin_password: mypassword

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

@@ -24,6 +24,11 @@ services:
 {% else %}
       - "BASE_URL={{ (miniflux_use_https == True) | ternary('https', 'http') }}://localhost/{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}"
 {% endif %}
+{% if miniflux_autoupdate is defined and miniflux_autoupdate %}
+    deploy:
+      labels:
+        - shepherd.autoupdate=true
+{% endif %}
 
   db:
     image: postgres:11