Point taken, guess I remembered it wrong. But if you take a look at the arch wiki, they say that your mentioned client is actually not official.
This article is mainly about the semi-official, proprietary Spotify for Linux client, which is developed by Spotify's engineers in their spare time and not actively supported by Spotify.
I tried to set this up recently but failed. I wish there was a up to date noob friendly guide for this. IIRC some containers, mongodb was one of them, didn't go healthy.