Add ability to subscribe to file updates
We currently have the ability to subscribe to notifications about specific issues or MRs, but it would be really nice to be able to subscribe to file updates.
Here's my current situation. I enjoy reading about updates to our gitlab handbook, as sometimes there are subtle changes that I want to keep track of. It would be nice to be able to subscribe to handbook pages, such that I get an email whenever a handbook page gets updated. I've been at GitLab for almost a year and the handbook has changed a lot since then. I'd love to know what the changes are but its a lot of effort to re-read the entire handbook.