Contrary to most of the others on this thread I appreciate you're using Java for this. Using Java means drawing upon a very robust foundation. This very much looks like a tool for business rather than personal use.

I can't imagine why a company wouldn't get a proper yet slightly more expensive server with an adequate amount of RAM instead of a vhost that only allows to run PHP, especially as the software itself comes for free and most companies such a tool would be useful for likely already have some sort of dedicated server - either on-prem or hosted - anyway.

Besides, Java often is the only option for deploying tools in larger companies.

I have one question, though: What's your business model with Lavagna? From what I've seen at a cursory glimpse there doesn't seem to be dual-licensing or anything similar (which on the other hand probably wouldn't make sense for a project management tool anyway).