fly deploy last commit instead of all files

fly-deploy-last-commit.sh

#!/usr/bin/env bash

last_commit=$(git log --format="%h %s" -n 1)

echo "this will deploy your last local commit"
echo $last_commit

while true; do
    read -p "Do you want to continue? (y/n) " yn
    case $yn in
        [Yy]* ) break;;
        [Nn]* ) echo "Aborted"; exit;;
        * ) echo "Please answer yes or no.";;
    esac
done

tmpdir=$(mktemp -d)
echo "temporary dir created ($tmpdir)"

# duplicate & purge
echo "copying to temporary dir..."
cp -r . $tmpdir
echo "files copied"

echo "purge unstaged & untracked files"
cd $tmpdir
git stash push -u

# deploy
echo "deploying..."
if flyctl deploy --remote-only
then
  echo "deployed successfully"
else
  echo "deploy failed"
fi

# cleanup
cd -
rm -rf $tmpdir
echo "temporary dir removed"