Alert on slack doesn't contains image but Telegram does

[iamatulsingh]

What happened: I tried an Alert which is sending image also in alert on Telegram but when using Slack, it's not sending image in the alert

What you expected to happen: Slack alert must also contains image of the alert

How to reproduce it (as minimally and precisely as possible): use slack as notification channel with bot token (starts with xoxb-) and not webhook

Anything else we need to know?: No

Environment:

• Grafana Image Renderer version: 3.11.3
• Grafana version: 11.1.4
• Installed plugin or remote renderer service: remote renderer service
• OS Grafana Image Renderer is installed on: Docker
• User OS & Browser: Windows 11 and chrome
• Others: please find my docker compose I used

services:
  grafana:
    image: grafana/grafana:latest
    ports:
      - '3000:3000'
    volumes:
      - ./defaults.ini:/usr/share/grafana/conf/defaults.ini
    environment:
      GF_RENDERING_SERVER_URL: http://renderer:8081/render
      GF_RENDERING_CALLBACK_URL: http://grafana:3000/
      GF_LOG_FILTERS: rendering:debug
      GF_UNIFIED_ALERTING_ENABLED: "true"
      GF_UNIFIED_ALERTING_SCREENSHOTS_ENABLED: "true"
      GF_UNIFIED_ALERTING_SCREENSHOTS_CAPTURE: "true"
      GF_PATHS_PROVISIONING: "/etc/grafana/provisioning"
      TZ: Europe/Berlin
  renderer:
    image: grafana/grafana-image-renderer:latest
    environment:
      TZ: Europe/Berlin
    ports:
      - 8081

[iamatulsingh]

Sorry it's an irrelevant issue for this project. I have already created PR to fix this in the alerting