Minimal build for distobuilder

I have following to build a custom image for my containers:

image:
  name: ubuntu-x86_64
  distribution: ubuntu
  release: jammy
  description: |-
    Ubuntu {{ image.release }}
  architecture: x86_64

source:
  downloader: debootstrap
  url: http://archive.ubuntu.com/ubuntu
  keyserver: keyserver.ubuntu.com
  keys:
    - 0x790BC7277767219C42C86F933B4FE6ACC0B21F32
    - 0xf6ecb3762474eda9d21b7022871920d1991bc93c
...

I created it based on template I saw somewhere, but ubuntu is quite heavy for my workload,
how to know which distributions are available, is there one for alpine?