add lightning example

docs/guides/frameworks/pytorch_lightning/pytorch_lightning_example.md

@@ -0,0 +1,35 @@
+---
+title: Pytorch Lightning
+
+---
+title: LightGBM
+---
+
+The [pytorch-lightning](https://github.com/allegroai/clearml/blob/master/examples/frameworks/pytorch-lightning/pytorch_lightning_example.py) 
+script demonstrates the integration of ClearML into code that uses PyTorch Lightning. 
+
+The example script does the following:
+* Trains a simple deep neural network on the PyTorch built-in MNIST dataset
+* Specifies Argparse configurations which are automatically captured by ClearML
+* Creates an experiment named `pytorch lightning mnist example`, which is associated with the `examples` project.
+
+## Scalars
+
+
+
+## Hyperparameters
+
+ClearML automatically logs command line options defined with argparse. They appear in CONFIGURATIONS > HYPER PARAMETERS > Args.
+
+
+## Artifacts
+
+Model artifacts associated with the experiment appear in the info panel of the **EXPERIMENTS** tab and in the info panel of the **MODELS** tab.
+
+
+## Console
+
+All other console output appears in **RESULTS > CONSOLE**.
+
+
+