Switch from debian to alpine in v6.0.0

[morgoth]

Hi.

I noticed that v6.0.0 of osrm-backend image switched to alpine. Was this intentional?

The release changelog states that the debian distro was updated, but not changed to alpine. Also the default Dockerfile points to debian, https://github.com/Project-OSRM/osrm-backend/blob/master/docker/Dockerfile

docker run --rm -it --entrypoint sh ghcr.io/project-osrm/osrm-backend:v6.0.0

/opt # cat /etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.21.3
PRETTY_NAME="Alpine Linux v3.21"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"