If you just need a basic hypervisor, you don’t need GitHub. VMware offers a free version of ESXi.
Running legacy software like VMware ESXi 5.5 often leads users to search GitHub for "leaked" or community-shared license keys to keep home labs alive. However, relying on these keys is generally a high-risk, short-term fix for a version of software that is long past its prime. The Legal and Security Reality esxi 5.5 license key github
License keys for 8.0 do not work on older versions like 7.0 or 5.5. Users often report having to specifically find keys intended for older builds. If you just need a basic hypervisor, you don’t need GitHub