Add README

tutorials/distributed-ml/tf-tutorial-1-imagenet/README.md

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+# Tutorial: distributed strategies for Tensorflow
+
+In this tutorial we show how to use Tensorflow `MultiWorkerMirroredStrategy`.
+Note that the environment is tested on the HDFML system at JSC.
+For other systems, the module versions might need change accordingly.
+Other strategies will be updated here.
+
+First, from the root of this repository, build the environment containing
+Tensorflow. You can *try* with:
+
+```bash
+# Creates a Python venv called envAItf_hdfml
+make tf-gpu-jsc
+```
+
+If you want to distribute the code in `train.py`, run from terminal:
+
+```bash
+sbatch tfmirrored_slurm.sh
+```