Update documentateion for pretraining

Author: MGlauer

README.md

@@ -6,20 +6,20 @@ ChEBai  is a deep learning library that allows the combination of deep learning
 ## Pretraining
 
 ```
-python -m chebai fit --config=[path-to-your-config] --trainer.callbacks=configs/training/default_callbacks.yml
+fit --data.class_path=chebai.preprocessing.datasets.pubchem.SWJChem --model=configs/model/electra-for-pretraining.ElectraPre --model.train_metrics=configs/metrics/micro-macro-f1.yml --model.val_metrics=configs/metrics/micro-macro-f1.yml --model.test_metrics=configs/metrics/micro-macro-f1.yml --trainer=configs/training/default_trainer.yml --trainer.callbacks=configs/training/default_callbacks.yml
 ```
 
 ## Structure-based ontology extension
 
 ```
-python -m chebai train --config=[path-to-your-electra_chebi100-config] --trainer.callbacks=configs/training/default_callbacks.yml  --model.pretrained_checkpoint=[path-to-pretrained-model] --model.load_prefix=generator.
+python -m chebai fit --config=[path-to-your-electra_chebi100-config] --trainer.callbacks=configs/training/default_callbacks.yml  --model.pretrained_checkpoint=[path-to-pretrained-model] --model.load_prefix=generator.
 ```
 
 
 ## Fine-tuning for Toxicity prediction
 
 ```
-python -m chebai train --config=[path-to-your-tox21-config] --trainer.callbacks=configs/training/default_callbacks.yml  --model.pretrained_checkpoint=[path-to-pretrained-model] --model.load_prefix=generator.
+python -m chebai fit --config=[path-to-your-tox21-config] --trainer.callbacks=configs/training/default_callbacks.yml  --model.pretrained_checkpoint=[path-to-pretrained-model] --model.load_prefix=generator.
 ```
 
 ```