Add chat template to tokenizer_config

tokenizer_config.json

@@ -29,7 +29,7 @@
   },
   "additional_special_tokens": [],
   "bos_token": "<s>",
-  "chat_template": "{{ bos_token }}{% for message in messages %}{% if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}{{ raise_exception('Conversation roles must alternate user/assistant/user/assistant/...') }}{% endif %}{% if message['role'] == 'user' %}{{ '[INST] ' + message['content'] + ' [/INST]' }}{% elif message['role'] == 'assistant' %}{{ message['content'] + eos_token}}{% else %}{{ raise_exception('Only user and assistant roles are supported!') }}{% endif %}{% endfor %}",
+  "chat_template": "{{ bos_token }}{% for message in messages %}{% if message['role'] == 'system' %}\nSYSTEM: {{ message['content']|safe }}\n{% elif message['role'] == 'user' %}\nUSER: {{ message['content']|safe }}\n{% elif message['role'] == 'assistant' %}\nASSISTANT: {{ message['content']|safe }}\n{% else %}{{ raise_exception('Only user, assistant, and system roles are supported!') }}{% endif %}\n{% endfor %}{{ eos_token }}",
   "clean_up_tokenization_spaces": false,
   "eos_token": "</s>",
   "legacy": true,