Generic webhook support for notificiation

[atropos112]

Is your feature request related to a problem? Please describe.

Currently watchtower supports msteams, slack, gotify and email and thats great.

What does surprise me is that i have no way (at least i couldn't hack it to do so) for me to give you a url and to have you webhook call me, no fancy slack/msteams etc. just "here is a link, send a json there please".

I would think that supporting msteams, slack etc. does that and then some so am somewhat surprised there is (at least not documented) way of doing just that.

Describe the solution you'd like

Have a generic webhook, providing a url to send notifications to in some json format

Describe alternatives you've considered

I tried getting slack notification to send me json to my source instead but the format of my url is not matching what it is expecting and its complaining the token is incorrect.

Additional context

No response

[github-actions]

Hi there! 👋🏼 As you're new to this repo, we'd like to suggest that you read our code of conduct as well as our contribution guidelines. Thanks a bunch for opening your first issue! 🙏

[red4dj]

This feature is available through watchtower's shoutrrr notifications.

A generic webhook can be triggered by setting --notification-url (env. WATCHTOWER_NOTIFICATION_URL) to a url with a generic prefix. e.g.

• generic://example.com/webhook-endpoint
• generic+https://example.com/webhook-endpoint

More info about the shoutrrr generic prefix can be found in their documentation.