Perhaps you didn't understand me correctly; what you're trying to do is called "bug tracking." The market is full of applications of this type; it's not just one alternative, there are dozens of them. Look at this link I just found where they show you about 30 of the best ones.
https://www.softwaretestingmaterial.com/popular-defect-tracking-tools/
For example, there are bug tracking tools that link to GitHub, and GitHub is a well-known tool.
Regarding your proposal, I reiterate, there are several alternatives. Unless you offer me something more convenient, it's unlikely you'll attract any attention. I wish you the best, but I think you should start by researching what's available on the market before setting the monthly price.