readme: 200 and 400 steps 4 instance images - 800 regularization images
  gzza78 person (450,500,550) SD 1.5 base model
   --pretrained_model_name_or_path=$MODEL_NAME \
    --pretrained_vae_name_or_path="stabilityai/sd-vae-ft-mse" \
    --output_dir=$OUTPUT_DIR \
    --revision="fp16" \
    --with_prior_preservation --prior_loss_weight=1.0 \
    --seed=1337 \
    --resolution=512 \
    --train_batch_size=1 \
    --train_text_encoder \
    --mixed_precision="fp16" \
    --use_8bit_adam \
    --gradient_accumulation_steps=1  --gradient_checkpointing\
    --learning_rate=1e-6 \
    --lr_scheduler="constant" \
    --lr_warmup_steps=0 \
    --num_class_images=800 \
    --sample_batch_size=1 \
    --max_train_steps=400 \
    --save_interval=200 \
    --save_sample_prompt="photo of gdj78 person" \
    --concepts_list="concepts_list.json"