You can use IFTTT to trigger automated actions when Latestver catalog items are updated to new versions.
Review the catalog at https://lv.binarybabel.org/catalog. The identifier for each item is NAME:TAG, for example rails:latest.
Create an account (or login) at https://ifttt.com
Click the New Applet button
Click the +this link text
Select the Feed service
Select the New feed items matches trigger
New feed items matches
Use the catalog identifier for the Keyword
Use the following url for the Feed
Create the trigger and customize action
That's it. When the Latestver catalog is updated your IFTTT applet will be triggered.