Unable to upload file to bucket: getting 404

[mswami1]

Error:

Writer.Close: googleapi: Error 404: Not Found, Not Found

docker service:

storage:
image: fsouza/fake-gcs-server
environment:
STORAGE_EMULATOR_HOST: localhost:4443
ports:
- '4443:4443'
command: -scheme http -port 4443 -public-host localhost:4443
volumes:
- .:/gcs_storage

client, err1 := storage.NewClient(context.TODO(), option.WithEndpoint("http://127.0.0.1:4443/storage/v1/"))