provide default app name

[r0fls]

This allows instantiating the Sanic object without providing an app name:

from sanic import Sanic
from sanic.response import json

app = Sanic()

@app.route("/")
async def test(request):
    return json({"hello": "world"})

app.run(host="0.0.0.0", port=8000)

[seemethere]

I think it would be better to use if name is None or if isinstance(name, NoneType) to account for falsey like values like ''

[r0fls]

@seemethere I can see an argument for that, yes. If someone wants the instance name to be an empty string, who am I to blame them. Updated.