revert 47bcbe481f

revert move to alpine

Dockerfile

@@ -1,15 +1,18 @@
-# hadolint ignore=DL3007
-FROM alpine:latest
-# hadolint ignore=DL3018
-RUN apk update --no-cache && \
-    apk add --no-cache \
-				build-essential \
-				wget \
-				rsync \
-				openssh-client \
-				ca-certificates \
-				debhelper \
-				git \
-				curl \
-				yamllint \
-				bash \
+FROM ubuntu:focal
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# hadolint ignore=DL3008,DL3028
+RUN apt-get update && \
+	apt-get -y --no-install-recommends install \
+		build-essential \
+		wget \
+		rsync \
+		openssh-client \
+		ca-certificates \
+		debhelper \
+		git \
+		curl \
+		yamllint \
+	&& apt-get clean && \
+	rm -rf /var/lib/apt/lists/* /var/tmp/* /tmp/*