entrypoint.sh

#!/bin/bash
set -e

# Check if the user already exists
if id "$USER_ID" >/dev/null 2>&1; then
  echo "User with ID $USER_ID already exists."
else
  # Create a new user with the specified ID
  useradd -m -u "$USER_ID" user
fi

# Run the CMD or any other command you want to execute
exec "$@"