Long overdue first commit with content

content/en/blog/docker/shell-usage-in-dockerfile.md

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+---
+title: "Shell usage in dockerfile"
+linkTitle: "Shell usage in dockerfile"
+date: 2019-02-04
+description: >
+  How to use a proper shell in a dockerfile
+---
+
+The default shell is `[“/bin/sh”, “-c”]`, which doesn't handle pipe fails when chaining commands. To process errors when using pipes use this :
+
+{{< highlight sh >}}
+SHELL ["/bin/bash", "-eux", "-o", "pipefail", "-c"]
+{{< /highlight >}}
+
+## References
+- https://bearstech.com/societe/blog/securiser-et-optimiser-notre-liste-des-bonnes-pratiques-liees-aux-dockerfiles/