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
To anyone new to strapi. Strapi V4 deprecated MongoDB, have a look at MySQL/MariaDB or PostgreSQL
https://manual.uberspace.de/en/database-mysql.html
https://manual.uberspace.de/database-postgresql/