I updated this module page with a step-by-step’ish guide on how to install and configure the module. Let me know if you run into any issues.
Since the module pulls lat/long data in JSON format from a file, you could just manually edit that file to update your location. This is in case you don’t want to use the GPS tracker on your phone.
What this means is that if you want to tweak the code, you could just have a file on your raspberry pi, or somewhere else on your home network that the lat/long is pulled from instead of setting up a website.