revert 47bcbe481f

revert move to alpine

Dockerfile

@@ -1,8 +1,10 @@
-# hadolint ignore=DL3007
-FROM alpine:latest
-# hadolint ignore=DL3018
-RUN apk update --no-cache && \
-    apk add --no-cache \
+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 \
@@ -12,4 +14,5 @@ RUN apk update --no-cache && \
 		git \
 		curl \
 		yamllint \
-				bash \
+	&& apt-get clean && \
+	rm -rf /var/lib/apt/lists/* /var/tmp/* /tmp/*