I am a system admin for a small company (20 employees) and we have recently purchased Jira servicedesk, Confluence and Bitbucket. Our usage is all internal so only 20 users and we don't have a lot of tickets, pages or commits (less than the "small" size on all of their recommendation sheets). I wanted to get your input on what hardware specs should be for a server that will house Jira, Confluence and Bitbucket.