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Use isolated docker config in test sandbox (#700)

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* Introduce DOCKER_CONFIG_FILE in test-suite

* Set DOCKER_CONFIG_FILE in CI

---------

Co-authored-by: Frederik Ring <frederik.ring@gmail.com>
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Lennard
2025-12-28 17:58:59 +01:00
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test/README.md
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@@ -41,6 +41,15 @@ IMAGE_TAG=v2.30.0 ./test.sh
By default, two local images are created that persist the image data and provide it to containers at runtime.
#### `DOCKER_CONFIG_FILE`
By default, the sandbox uses an empty Docker config file (`./docker-config.json`).
To use host credentials (e.g. in CI), set `DOCKER_CONFIG_FILE` to the desired `config.json` location:
```sh
DOCKER_CONFIG_FILE=${HOME}/.docker/config.json ./test.sh
```
## Understanding the test setup
The test setup runs each test case in an isolated Docker container, which itself is running an otherwise unused Docker daemon.