move to alpine

Dockerfile

@@ -1,14 +1,10 @@
-FROM ubuntu:focal
+# hadolint ignore=DL3007
+FROM alpine:latest
 
-# deaktiviert Nachfragen beim installieren von Paketen
-ENV DEBIAN_FRONTEND=noninteractive
-
-# hadolint ignore=DL3008,DL3028,DL4006
-RUN apt-get update && \
-   	apt-get -y --no-install-recommends install \
-		python3-pip curl && \
-		apt-get clean && \
-	  rm -rf /var/lib/apt/lists/* /var/tmp/* /tmp/*
+# hadolint ignore=DL3018
+RUN apk add --no-cache \
+		python3-pip \
+    curl
 
 WORKDIR /app