Facilitate deployment

Using `from transformers import pipeline` requires having set these hyperparameters by default in the config.

tokenizer_config.json

@@ -1,6 +1,6 @@
 {
   "add_bos_token": true,
-  "add_eos_token": false,
+  "add_eos_token": true,
   "add_prefix_space": true,
   "added_tokens_decoder": {
     "0": {
@@ -1090,6 +1090,7 @@
   "legacy": true,
   "model_max_length": 512,
   "pad_token": "<pad>",
+  "mask_token": "<mask>",
   "sp_model_kwargs": {},
   "spaces_between_special_tokens": false,
   "tokenizer_class": "LlamaTokenizer",