Adding jinja template

config.yaml

@@ -200,6 +200,18 @@ sink:
       _target_: obsei.sink.SlackSinkConfig
       slack_token: ''
       channel_id: ''
+      jinja_template: |
+        :bell: Hi there!, a new notification by *Obsei*
+        >Content:
+        ```
+          {%- for key, value in payload.items() recursive%}
+            {%- if value is mapping -%}
+              {{loop(value.items())}}
+            {%- else %}
+              {{key}}: {{value}}
+            {%- endif %}
+          {%- endfor%}
+        ```
   Elastic:
     _icon_: "https://raw.githubusercontent.com/obsei/obsei-resources/master/logos/elastic.png"
     _help_: