Replace deprecated 'docker-compose' with 'docker compose' CLI

[koolwilly72]

This PR updates the setup.sh script to use the newer docker compose CLI syntax.

Changes made:

• Replaced all instances of docker-compose with docker compose

Why:

• The docker-compose binary is deprecated in favour of the docker compose plugin
• Avoids compatibility issues on newer Docker installations (e.g. Docker v28+)

Tested on:

• Ubuntu 22.04 with Docker Engine v28.1.1
• Confirmed working on a machine that previously failed due to docker-compose being unavailable

No functional changes, just syntax modernization for better compatibility.

[Yes-Sebastian]

I support this PR. The commit seems to be error-free.

[rihards-simanovics]

@koolwilly72 & @Yes-Sebastian

❗Attention❗

Please migrate to InvoiceShelf, a fork of crater which continues the development of this project.

More info on new fork availible in this issue: #1281