@Muhammad_Shoaib Check these post.
https://discuss.frappe.io/t/erpnext-production-v14-8-0-ova-download-link/96926/41?u=hafiz4saqib
https://discuss.frappe.io/t/erpnext-production-v14-8-0-ova-download-link/96926/44?u=hafiz4saqib