PixieDust App is not possible run in container with Czech locale

Please i have Jupyter Python notebook with PixieDust 1.1.1 and I try to deploy it as standalone web app in a container according this guide https://medium.com/ibm-watson-data-lab/deploy-your-analytics-as-web-apps-using-pixiedusts-1-1-release-d08067584a14It works fine with default English locale, but it doesn't work when I try to use Czech locale in the notebook:import locale loc = locale.setlocale(locale.LC_ALL,‘cs_CZ’)Any idea how to fix/install additional locales to the container?thank you...Read more