docker: add r 4.0.3

src/.docker_modules/r-base/4.0.3/Dockerfile

+FROM alpine:3.13.1
+MAINTAINER Lauret Modolo
+
+ENV R_PKGS R=~4.0.3 \
+  R-mathlib=~4.0.3 \
+  R-dev=~4.0.3 \
+  R-doc=~4.0.3
+
+ENV R_DEPS g++ \
+  libxml2-dev \
+  make \
+  cmake \
+  linux-headers \
+  cairo-dev \
+  libxmu-dev \
+  pango-dev \
+  perl \
+  tiff-dev \
+  icu-dev \
+  libjpeg-turbo \
+  pcre-dev \
+  readline-dev \
+  libexecinfo-dev \
+  file \
+  ttf-linux-libertine \
+  git \
+  openssl \
+  autoconf \
+  automake \
+  libuv \
+  http-parser \
+  tzdata \
+  libgit2-dev \
+  bash
+
+RUN apk add --update --no-cache ${R_PKGS} ${R_DEPS}

src/.docker_modules/r-base/4.0.3/docker_init.sh

+#!/bin/sh
+docker pull lbmc/r-base:4.0.3
+docker build src/.docker_modules/r-base/4.0.3 -t 'lbmc/r-base:4.0.3'
+docker push lbmc/r-base:4.0.3