content: #
  # Copyright 2021 Alexander Vollschwitz
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  
  FROM xelalex/dregsy:latest-ubuntu
  
  # install & configure Go
  RUN apt-get update && \
      apt-get install -y --no-install-recommends --fix-missing \
          golang && \
      apt-get clean -y && \
      rm -rf \
          /var/cache/debconf/* \
          /var/lib/apt/lists/* \
          /var/log/* \
          /tmp/* \
          /var/tmp/*
  
  ENV GOROOT /usr/lib/go
  ENV GOPATH /go
  ENV GOCACHE /.cache
  ENV PATH /go/bin:${PATH}
  RUN mkdir -p ${GOPATH}/src ${GOPATH}/bin ${GOPATH}/pkg ${GOCACHE}
  
  # non-root user
  ARG USER=go
  RUN groupadd -o -g ${GROUP_ID:-1000} ${USER} && \
      useradd -l -o -u ${USER_ID:-1000} -g ${USER} ${USER} && \
      install -d -m 0755 -o ${USER} -g ${USER} /home/${USER}
  ENV HOME /home/${USER}
  USER ${USER}
  
  WORKDIR ${GOPATH}
  
  CMD ["go", "version"]
  