install wordpress and wp-cli with docker

Looking for an outofthebox wordpress install with command line interface I tried this:

https://zerowp.com/wordpress-and-docker

Just two little quirks in the proposed compose.yaml I had to correct:

• WORDPRESS_TABLE_PREFIX=wp\_ shouldn´t contain the backslash
  (looks like an editor adding escapes on pasting)
• user id = 33 missing, which I found in

https://stackoverflow.com/questions/50999848/how-to-run-wp-cli-in-docker-compose-yml

Thus DB Export succeeded;

root@ubuntu:~/wp# docker-compose run --rm wpcli db export

# Before:
...
Running 0.0s mariadb-dump: Can't create/write to file 'wp-app-2025-07-24-8d86674.sql' (Errcode: 13 "Permission denied")

# After:
...
Success: Exported to 'wp-app-2025-07-24-f885306.sql'.