Standalone openhab Alexa binding

I’m new to Openhab, but I’ve managed to install Openhab and connected it to my homematic. I recently bought an Amazon echo and would like to connect this with Openhab. I have come across the following project:

Can I start this on a separate server without having to use the Amazon Lambda service.

I only have roller shutters so the Hue Emulation is not the optimal choice.
And i am from Germany and the voice commands are for my grandma so unityfire/alexa-ha wont work because of the Utterances.