Ensure alpine uses bash

Author: Chuxel

script-library/test/regression/Dockerfile

@@ -9,6 +9,9 @@ FROM ${IMAGE_TO_TEST}
 
 USER root
 
+RUN . /etc/os-release \
+    && if [ "${ID}" = "alpine" ] || [ "${ID_LIKE}" = "alpine" ]; then apk add bash; fi
+
 ARG USERNAME="vscode"
 ARG RUN_COMMON_SCRIPT="true"
 ARG UPGRADE_PACKAGES="false"

script-library/test/regression/alt.Dockerfile

@@ -12,7 +12,8 @@ USER root
 ARG USERNAME="bort"
 RUN . /etc/os-release \
     && if [ "${ID}" = "alpine" ] || [ "${ID_LIKE}" = "alpine" ]; then \
-        addgroup -g 1001 the-borts && adduser -D -s /bin/bash -u 1001 -G the-borts ${USERNAME}; \
+        apk add bash \
+        && addgroup -g 1001 the-borts && adduser -D -s /bin/bash -u 1001 -G the-borts ${USERNAME}; \
     else \
         groupadd --gid 1001 the-borts && useradd -s /bin/bash --uid 1001 --gid 1001 -m ${USERNAME}; \
     fi