How to upgrade from 4.3 to 5.0 on server console?

I am using digital ocean hosting a plone 4.3 site. How can I upgrade it to plone 5.0 on the digital ocean console?

As far as my understanding of digitalocean (DO) goes they only provide virtual servers with a number of basic linux/unixy os images you van select from. There is also an API that you or other service providers can use to bootstrap or start servers. But there's no direct Plone 5 support from DO.

Hoe did you unstall the Plone 4.3 site on the server? Did you do this yourself or somebody else?