format-code: enable beautysh

beautysh is a code formatter for bash/sh/zsh.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I0ebd5da9e78d84a98940fb3e6618b12cf8eb0fc7
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 1de8f8b..2aa4c50 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -845,6 +845,7 @@
 """
 
 dockerfile_base += """
+RUN pip3 install beautysh
 RUN pip3 install codespell
 RUN pip3 install flake8
 RUN pip3 install gitlint