Production: TensorFlow and Keras
Once model has been trained with Keras


It can be exported to TensorFlow model OR
With tf.keras it can be served as http service 


Examples :

https://towardsdatascience.com/deploying-keras-models-using-tensorflow-serving-and-flask-508ba00f1037

https://medium.com/tensorflow/training-and-serving-ml-models-with-tf-keras-fd975cc0fa27

https://medium.com/@mr.acle/exporting-deep-learning-models-from-keras-to-tensorflow-serving-7d4a6e49ce3