A example geodesign Impacts service that can be linked to Geodesign Hub. Once deployed on Heroku or similar services, it will seamlessly interoprate with Geodesign Hub. Geodesign Hub will send geometry information to the service and the service sends back impacts information to be displayed at the time of design.
This is a Python Flask service and also provides basic service authentication. It also has a Heroku geo enabled buildpack along with SciPy and Python stack. It may be used if you plan to use Shapely, Rasterio or Fiona or other Python libraries.
In case you plan to use the buildpacks use the command below on Heroku to trigger multiple buildpacks
heroku buildpacks:set https://github.com/ddollar/heroku-buildpack-multi.git