Build failed when trying docker-compose up

[awkto]

Followed the docker instructions on the main page but getting an error right away. I've put in the env var for my google gemini api key.

$ docker-compose up
Creating network "deepwiki-open_default" with the default driver
Building deepwiki
DEPRECATED: The legacy builder is deprecated and will be removed in a future release.
            Install the buildx component to build images with BuildKit:
            https://docs.docker.com/go/buildx/

Sending build context to Docker daemon  1.221MB
Error response from daemon: dockerfile parse error on line 13: unknown flag: exclude
ERROR: Service 'deepwiki' failed to build : Build failed

OS : Ubuntu 24.10
Docker version 26.1.3, build 26.1.3-0ubuntu1.1
docker-compose version 1.29.2, build unknown

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Line 13 is this guy from the Dockerfile

13 COPY --exclude=./api . .

[awkto]

Kinda solved it on my own but maybe update the Dockerfile with this fix

1. Change line 13
   from 13 COPY --exclude=./api . .
   to 13 COPY . .

2. Replace it by explicitly adding all the files in the workingdir

   • minus ./api/
   • minus all the existing entries in .dockerignore

3. Run the docker-compose up again

This was the Dockerfile that I ended up with
https://gist.github.com/awkto/55774cd7a4179b2e44de9cb15e73beb7