Git branch and commit empty in Docker after updating from 0.29.0

[Esgrove]

I have an API that runs in Docker.

In my dockerfile, I copy the .git dir to the docker builder image so shadow can read the values.

COPY api/Cargo.toml api/Cargo.lock api/build.rs api/.cargo/config.toml .git ./

However, after updating to 0.31.0 and 0.31.1, the git variables that I use are empty so shadow-rs no longer works correctly when building inside Docker.

[Esgrove]

Turns out the amazon linux docker image does not have git available by default. Works after installing git in the image first.

Would be good for you to document that this crate now requires git to be available unlike previously. The CHANGELOG.md document has not been updated in two years as well so please either start updating it again or just remove it since currently it is not providing any value.

[baoyachi]

@Esgrove Please use new publised version：

shadow-rs = "0.32.0"