This summary describes the collection of necessary tutorials to host strapy on your uberspace
just follow this well written tutorial.
take just a segment of this tutorial. be sure to use the before defined credentials (like, ip address, port, username e.g. of your freshly created database)
just follow this tutorial
a list of detailed steps can be found here
Your cms should be now available under https://subdomain.yourdomain.com/admin
I wrote a tutorial on how I got it running lately: https://gist.github.com/jnsprnw/be73def30e93ed79a3ecfd7d06b29da7