I made a local Typo3 12.4.9 website and created a GitHub repository.
Now I want to host it with IONOS. Cloning the repository with SSH worked, but now I don't know what to do next.
I cant install composer Error in argument 1, char 2: option not found r
The IONOS support cant help me and I didnt find a documentation about it. I hope you can help me. Thanks in adance.
Edit: Added /usr/bin/php8.0-cli before the command. Now I can install composer and Typo3. But that brings me to the next problem:
Usually the IONOS webspace is directed to the project (e.g. /clickandbuilds/website) which includes the files that are in my public directory and few more.
This is my project: 
Second picture is the typical Typo3 website from ionos after installing composer. 
Where do I have to link the web space?
Install composer stuff locally. And then copy it (rsync) to the server. Then use TYPO3 commandline Tools for db Update Schema, flushing caches and more.