atlas-in-docker does not provide a git executable

[robinstraub]

The documentation states Atlas is shipping "a set of official Docker Images for you to use." (source).

When trying to run Atlas inside docker, and linting migrations against a git branch, it fails with the following error:

Error: lookup git: exec: "git": executable file not found in $PATH

Upon inspection, none of the shipped images provide a git executable.

Reproduction

Run the following command (with a valid dev-url parameter as input):

docker run arigaio/atlas:latest-community-alpine migrate lint --git-base=master --dev-url="postgres://postgres:postgres@postgres:5432"

Fix

Could you either bundle a git executable in one of the the images (my strong preference 😅), or at least refer the limitation in the Common Issues section of the documentation?

If you're concerned about the added image weight, given how optimized yours are, installing git would at ~2.9MB 😗

I'd be willing to open a pull request but I don't think the Dockerfile for the images is versionned in this repo.