Dockerfile

# https://hub.docker.com/r/stefansundin/rssbox
# docker pull stefansundin/rssbox
# docker run -i -t -p 3000:3000 stefansundin/rssbox
# docker run -i -t --entrypoint bin/cons stefansundin/rssbox

# docker network create rssbox
# docker run --rm --network=rssbox --name=redis redis redis-server --appendonly yes
# docker run --rm --network=rssbox --name=rssbox --env-file=.dockerenv -i -t -p 3000:3000 stefansundin/rssbox
# docker run --rm --network=rssbox -t redis redis-cli -h redis monitor

# docker build --squash -t stefansundin/rssbox .
# docker push stefansundin/rssbox

FROM stefansundin/ruby:2.7
LABEL maintainer="stefansundin https://github.com/stefansundin/rssbox"

# install gem dependencies
RUN \
  apt-get update && \
  apt-get upgrade -y && \
  apt-get install -y --no-install-recommends libxml2-dev libxslt1-dev libcurl4 && \
  apt-get clean && \
  rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY Gemfile Gemfile.lock ./
RUN bundle install --retry=3 --jobs=4 --without=development:test --path=.bundle/gems
COPY . .

# Run the container as an unprivileged user
RUN mkdir -p tmp
RUN chown nobody:nogroup tmp
USER nobody:nogroup

EXPOSE 3000
ENV PORT=3000
ENTRYPOINT ["bin/server"]