healthchecks/templates/integrations/signal_message.html

{% load humanize %}{% spaceless %}
{% if check.status == "down" %}
    The check “{{ check.name_then_code|safe }}” is DOWN. Last ping was {{ check.last_ping|naturaltime }}.
{% else %}
    The check “{{ check.name_then_code|safe }}” is now UP.
{% endif %}
{% endspaceless %}