Using environment variables for paramaters

[waqassiddiqi]

We are using ChatOps to train, register and deploy our models and I am wondering if we add a feature to get parameters from environment variables in addition to the json file?
Reason being, instead of hardcoding data in json file for model tag and model properties, one can specify these values during runtime. One way is to modify the json file through manual scripts but wondering if there is a cleaner way possible.