Added Heroku deployment button to README

README.md

@@ -1,6 +1,8 @@
 # Nightscout LibreLink Up Uploader/Sidecar
 Simple Script written in JavaScript (Node) that uploads CGM readings from LibreLink Up to Nightscout. The upload happens every minute and should work with at least Freestyle Libre 2 and Libre 3 CGM sensors.
 
+[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/timoschlueter/nightscout-librelink-up)
+
 ## Configuration
 The script takes the following environment variables
 
@@ -61,4 +63,4 @@ services:
 
 ## ToDo
 - **Enable multiple readings**: Currently the script takes the first persons glucose data that the configured account has been given access to via LibreLink Up. This should either be configurable or automatically get every persons measurements
-- **Integration into Nightscout**: I have not yet looked into the plugin architecture of Nightscout. Maybe this should be converted into a plugin.
+- **Integration into Nightscout**: I have not yet looked into the plugin architecture of Nightscout. Maybe this should be converted into a plugin.