with KNIME Server you have different ways how to deploy your workflow into an application. One solution would be that you build a small webportal page. This is quite easy, you just need to encaspulate your nodes in components, than each component is one webportal page. For interaction you can use the widget and javascript nodes.
The Server also comes with an REST API. This would enable you to write your own application and call the workflow via REST.
If this is just too showcase for a short project, you can use the KNIME AWS instances, we have a free 30 day trial there.