build/Dockerfile
FROM debian:bullseye-slim
WORKDIR /tmp
COPY . /tmp
RUN apt-get update && \
apt-get upgrade -y --no-install-recommends && \
apt-get install -y --no-install-recommends \
ruby-dev bundler openjdk-17-jre-headless wget tar && \
bundle install && \
apt-get --purge remove -y \
ruby-dev && \
apt-get --purge autoremove -y && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*