Dasher provides support for triggering things when you press one of those free Amazon Dash buttons.
Follow the directions on how to find your Dash button's MAC address. Then plug that MAC address into
roles/homelabos/templates/dasher.config.json. Edit the URL, headers and body as needed for your use case. The default example shown causes Home Assistant to toggle the Living Room lights.
The docker image comes from hijinx/dasher and currently does not support arm devices. If you are aware of a suitable substitution or replacement (good place to start), please see issue 478 and test your idea using the documentation.
No direct access, but like all the images you can tail the logs in Portainer