Update Dockerfile

[ymosy]

Hi. I noticed that #303 is open and decided to help with a quick Dockerfile update.

Build:

docker build -t gping .

Run:

docker run -it --rm gping google.com

Hope this helps!

Full changelog is below:

• Switch to Debian 12 "bookworm"
• Adjust cargo install command
• Switch to iputils-ping as required by gping
• Format Dockerfile

[orf]

Thank you! This looks good, I’ll push some CI changes to also publish this image to the GitHub package registry.

I will keep this PR open to remind me to do this, unless you also fancy adding a GitHub actions step to do this.

[ymosy]

Glad to help! Sorry, but I'm not too familiar with multiplatform Rust builds so I guess I'd rather leave that part to someone more experienced.

[orf]

It's now automatically publishing: https://github.com/orf/gping/pkgs/container/gping

You should be able to use docker pull ghcr.io/orf/gping:master. The next time I do a release it should be tagged correctly.

Thanks for the contribution!