Have a generator.py to generate Dockerfiles from blocks

[tlkh]

Is your feature request related to a problem? Please describe.
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Have a generator.py to generate Dockerfiles from blocks.

Describe the solution you'd like
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• decompose Dockerfiles into blocks (e.g. TF block, PyTorch block)
• have a simple python script to generate Dockerfiles with specific settings
  • could have a NGC specific shim as well?
• build all, and push to Docker Hub

Describe alternatives you've considered
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NIL

Additional context
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See: https://github.com/ufoym/deepo#build-your-own-customized-image-with-lego-like-modules