The context here may not have Fly-specific keys

[kzys]

Fixing the panic below.

panic: interface conversion: interface {} is nil, not *config.Config

goroutine 68 [running]:
github.com/superfly/flyctl/internal/config.FromContext(...)
/home/runner/work/flyctl/flyctl/internal/config/context.go:15
github.com/superfly/flyctl/internal/build/imgsrc.authConfigs({0x1d5c6a8, 0xc000dfff80})
/home/runner/work/flyctl/flyctl/internal/build/imgsrc/docker.go:428 +0x276
github.com/superfly/flyctl/internal/build/imgsrc.(*buildkitAuthProvider).Credentials(0x16?, {0x1d5c6a8?, 0xc000dfff80?}, 0xc000dfb2f0)
/home/runner/work/flyctl/flyctl/internal/build/imgsrc/buildkit.go:151 +0x4c

[pborzenkov]

I think this re-introduces the same problem that my original PR was trying to fix: -t flag is gonna be ignored by getAPIToken().

How about passing the token to newBuildkitAuthProvider() and, respectively, authConfigs() (and drop context.Context argument from authConfigs())?

[kzys]

Oh that was the intention. Sorry I didn't read your PR carefully...

[kzys]

Merged #2324 instead. @pborzenkov would work on its actual fix.