If you want to use your existing server image on the cloud server, create a bootable OS storage. You will have to install a new server, upload the image to your host cloud and configure a new disk device. Login to your cloud control panel and create a Linux server with two storages.
Upload the image file on to the first storage and leave the second one with sufficient capacity for your own server image. Write a description, select a close location for faster upload of the server image and save them on the 2nd storage that is empty. Press the install button. It will become your primary disk.