The content owned by the municipality of Rostock and offered via this web application are made available under the Creative Commons Zero Universal 1.0 Public Domain Dedication (CC0 1.0). This means that you can do what ever you want with the data without having to ask for further permission.
This web application offered by the municipality of Rostock is based on Flask, a micro web framework written in Python. It is published under the free BSD License. Furthermore, the following libraries are used:
The font used within this web application is called PT Sans. It was created in 2009 by ParaType and is published here under this license.
The icons used within this web application for illustrating the themes are taken from Font Awesome a font and icon toolkit published under the SIL Open Font License 1.1 (OFL).