Support for Llama-3-8B-Instruct model about chat-ui HOT 2 OPEN

MONGODB_URL=mongodb://localhost:27017
USE_LOCAL_WEBSEARCH=true
PUBLIC_APP_ASSETS=chatui
HF_ACCESS_TOKEN=hf_none
PUBLIC_APP_DESCRIPTION="ChatGPT But Open Source!"
PUBLIC_APP_NAME=ChatGPT
MODELS=`[
  {
      "name": "Llama-3",
      "description": "Meta Llama3 is a great overall model",
       "preprompt": "This is a conversation between User and Llama, a friendly chatbot. Llama is helpful, kind, honest, good at writing, and never fails to answer any 	requests immediately and with precision.",
       "promptExamples": [
      {
        "title": "Write an email from bullet list",
        "prompt": "As a restaurant owner, write a professional email to the supplier to get these products every week: \n\n- Wine (x10)\n- Eggs (x24)\n- Bread (x12)"
      }, {
        "title": "Code a snake game",
        "prompt": "Code a basic snake game in python and give explanations for each step."
      }, {
        "title": "Assist in a task",
        "prompt": "How do I make a delicious lemon cheesecake?"
      }
      ],
      "tokenizer" : "philschmid/meta-llama-3-tokenizer",
      "parameters": {
        "temperature": 0.2,
        "top_p": 0.95,
        "repetition_penalty": 1.0,
        "top_k": 50,
        "truncate": 4096,
        "max_new_tokens": 4096,
        "stop": ["<|eot_id|>"]
    },
	"endpoints": [
        {
         "type": "ollama",
         "url" : "http://127.0.0.1:11434",
         "ollamaName" : "llama3:instruct"
    }]
  }
]`