add KO_DEFAULTBASEIMAGE usage to docs (ko-build#895)

Signed-off-by: Batuhan Apaydın <batuhan.apaydin@trendyol.com> Signed-off-by: Batuhan Apaydın <batuhan.apaydin@trendyol.com>
cpanato · Nov 30, 2022 · 45240bf · 45240bf
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commit 45240bf
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diff --git a/docs/configuration.md b/docs/configuration.md
@@ -20,6 +20,12 @@ You can override this base image in two ways:
 defaultBaseImage: registry.example.com/base/image
 ```
 
+You can also use the `KO_DEFAULTBASEIMAGE` environment variable to set the default base image, which overrides the YAML configuration:
+
+```shell
+KO_DEFAULTBASEIMAGE=registry.example.com/base/image ko build .
+```
+
 2. To override the base image for certain importpaths:
 
 ```yaml