Improve indentation of required package installations.

@@ -51,7 +51,9 @@ ADD https://github.com/containers/skopeo/archive/refs/tags/v${SKOPEO_VERSION}.ta
 FROM debian:${HOST_BASE_VERSION} AS host-base-tools
 RUN	true && \
 	apt-get update && \
-	apt-get install -y bash-completion git libgpgme11 libsubid4 libdevmapper1.02.1 && \
+	apt-get install -y \
+		bash-completion git \
+		libgpgme11 libsubid4 libdevmapper1.02.1 && \
 	adduser tool && \
 	apt-get clean && \
 	true