entrypoint.sh

#!/bin/bash
set -e

# Check if USER_ID environment variable is set
if [ -n "$USER_ID" ]; then
  # Create user with specific UID and disabled password
  adduser --disabled-password --gecos "" --uid "$USER_ID" user

  # Switch to the newly created user
  su -l user
fi

# Execute the command provided to the container as arguments
exec "$@"