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There might by a slight error when illustrating the `additional_contexts` attribute. The compose file declares two services with the same name. It might induce misunderstanding, especially since the second service's image uses the first one to build upon. ## Description I replaced the key defining the second service of the compose file used to illustrate the `additional_contexts` attribute, since the key `base` is used twice. Of course, any better replacement could be used, instead of `my-service`. It is invalid to use the same key twice (the error: `mapping key "base" already defined at line 2` is expected on `docker compose up`), and it does harm the understanding of the illustrated point of building a service's image using another one to share layers. ## Reviews <!-- Notes for reviewers here --> <!-- List applicable reviews (optionally @tag reviewers) --> - [ ] Technical review - [ ] Editorial review - [ ] Product review