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Pants

For the `docker_image` target how can I specify additional contexts like <https://docs.docker.com/compose/compose-file/build/#additional_contexts|this> in the BUILD file?

That seems to be a docker compose feature, so would not be available from pants. 

I don’t think it is limited to docker-compose. I use it as
```docker build \
    --build-arg ABC="***" \
    -t my-project:latest \
    --build-context "extra=${HOME}/.cofig/auth/" src/my-project/```
and within the Dockerfile the additional build-context is used as
```...
COPY --from=extra auth.json /root/.config/auth/auth.json
...```

I guess this would have been a more appropriate link instead of the docker-compose one - <https://docs.docker.com/reference/cli/docker/buildx/build/#build-context>

Ah, right!
Yea, the Dockerfile instruction is available as-is, naturally. The cli option is lacking passing arbitrary args, iirc. There’s no bespoke pants feature for this as far as I know. 