harmony/README.md

Due to the current setup being a mix of separate repositories with gitignore and rust workspace, a few options are required for cargo-watch to have the desired behavior :

RUST_LOG=info cargo watch --ignore-nothing -w harmony -w private_repos/ -x 'run --bin nationtech' 

This will run the nationtech bin (likely private_repos/nationtech/src/main.rs) on any change in the harmony or private_repos folders.