📝 Update docs, add first tutorials

docs/tutorial/src/all/tutorial045.py

@@ -0,0 +1,28 @@
+from typing import Set
+
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+app = FastAPI()
+
+
+class Item(BaseModel):
+    name: str
+    description: str = None
+    price: float
+    tax: float = None
+    tags: Set[str] = []
+
+
+@app.post("/items/", response_model=Item, summary="Create an item")
+async def create_item(*, item: Item):
+    """
+    Create an item with all the information:
+    
+    * name: each item must have a name
+    * description: a long description
+    * price: required
+    * tax: if the item doesn't have tax, you can omit this
+    * tags: a set of unique tag strings for this item
+    """
+    return item