CORS fix for use on locahost

[GrantSparks]

I had to add the following code to allow me to execute XHR requests from a local html/javascript file.

cog/python/cog/server/http.py

...

from fastapi.middleware.cors import CORSMiddleware

...

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

[zeke]

Thanks for sharing, @GrantSparks 👍🏼

[anotherjesse]

I did an initial pass at integrating this: https://github.com/replicate/cog/pull/737