app.py

from fastapi import FastAPI
from fastapi.responses import HTMLResponse
from pydantic import BaseModel

class Item(BaseModel):
    name: str
    price: float

    
app = FastAPI()


@app.get("/")
def home():
    html_content = open('index.html').read()
    return HTMLResponse(content=html_content, status_code=200)


@app.get("/hello")
def hello():
    return {"hello": "world"}

@app.post("/items")
def update_item(item: Item):
    return {"item_name": item.name, "twice price": item.price * 2}