I've got my own home web server and I authenticate with my own self signed https certificates; security is surely handled. Not to mention the server framework from a real time architecture simulator I helped write for my masters thesis:
https://github.com/masc-ucsc/liveos.
In my experience, Google cloud services are great for computational workloads. Nothing to compute in my case, just plotting gps and displaying data sent from the car. Open street maps is great for that task
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