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@@ -164,6 +164,11 @@ any point in an image's history, much like source control.
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The *exec* form makes it possible to avoid shell string munging, and to `RUN`
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commands using a base image that does not contain `/bin/sh`.
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+> **Note**:
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+> To use a different shell, other than '/bin/sh', use the *exec* form
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+> passing in the desired shell. For example,
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+> `RUN ["/bin/bash", "-c", "echo hello"]`
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+
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The cache for `RUN` instructions isn't invalidated automatically during
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the next build. The cache for an instruction like `RUN apt-get
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dist-upgrade -y` will be reused during the next build. The cache for
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Doug Davis