uv init --lib --no-readme lib-new
uv init --app --package --no-readme app-new
uv --directory app-new add --editable ../lib-new

...

uv --directory lib-new lock
uv --directory app-new lock

docker build -t monorepo -f Dockerfile . &&
    docker build -t monorepo.merged -f Dockerfile.merged . &&
    docker run --rm monorepo.merged