ARG FROM_TAG=release-alpine
FROM ponylang/ponyc:${FROM_TAG}

RUN apk update \
  && apk upgrade \
  && apk add --update --no-cache \
  bash \
  git-fast-import \
  libffi \
  libffi-dev \
  libressl \
  libressl-dev \
  python3 \
  python3-dev \
  py3-pip \
  && pip3 install --upgrade pip \
  && pip3 install mkdocs mkdocs-material

ARG FROM_TAG=release-alpine
FROM ponylang/ponyc:${FROM_TAG}

RUN apk update \
  && apk upgrade \
  && apk add --update --no-cache \
  bash \
  git-fast-import \
  libffi \
  libffi-dev \
  libressl \
  libressl-dev \
  python3 \
  python3-dev \
  py3-pip \
  tar \
  && pip3 install --upgrade pip \
  && pip3 install mkdocs mkdocs-material

Add gnu tar to stdlib-builder
Add gnu tar to stdlib-builder

Needed to make the new GitHub pages hosted version work. The upload
artefacts GitHub action requires GNU tar on Linux. It will fail
if presented with busy-box tar.
