Add capability tuning

[ZackaryWelch]

Is there any way to run the equivalent of --add-cap or --drop-cap as you can through CLI docker build? Apart from using docker compose instead, which might be the only way right now.

[crazy-max]

We don't but you can set entitlements when creating a builder through buildkitd-flags input in setup-buildx-action or the BuildKit configuration.

If you can explain a bit more your use case and what kind of limitations you encounter when building, that would help.