Start an application with specified profile.

    Does nothing if application is already running.

def app_start(name, profile, **kwargs):
    """
    Start an application with specified profile.

    Does nothing if application is already running.
    """
    ctx = Context(**kwargs)
    ctx.execute_action('app:start', **{
        'node': ctx.repo.create_secure_service('node'),
        'name': name,
        'profile': profile
    })