docker build fails

[toughIQ]

Is there a special way how to build the container image?
I tried podman build -t test:1 -f Dockerfile . and some variations and source versions, but it keeps failing with an error like this:

[fishnet 2.6.7] thread 'main' panicked at 'Directory "Stockfish/src" does not exist. Try: git submodule update --init', build.rs:99:9
[fishnet 2.6.7] note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: failed to run custom build command for `fishnet v2.6.7 (/fishnet)`

Caused by:
  process didn't exit successfully: `/fishnet/target/release/build/fishnet-1f651a0fa179c863/build-script-build` (exit status: 101)

Thanks, Chris

[niklasf]

This repository uses submodules. Run git submodule update --init in the working directory.