Add Ubuntu Hirsute

hirsute/x86_64/Dockerfile

+FROM ubuntu:hirsute
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# absolute apt-get path because: eatmydata: unable to find 'apt-get' in PATH
+RUN apt-get update \
+ && apt-get install -y eatmydata \
+ && eatmydata /usr/bin/apt-get upgrade -y
+
+RUN eatmydata /usr/bin/apt-get install -y \
+  sudo wget curl tar expect git \
+  devscripts build-essential lintian ccache pbuilder aptitude apt-utils
+
+# not apt-key add because:
+# E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
+RUN eatmydata /usr/bin/apt-get install -y gnupg2 \
+ && curl https://packages.icinga.com/icinga.key | gpg --dearmor -o /usr/share/keyrings/icinga-archive-keyring.gpg \
+ && DIST="$(lsb_release -sc)" \
+ && echo "deb http://packages.icinga.com/ubuntu icinga-${DIST} main" > /etc/apt/sources.list.d/${DIST}-icinga.list
+
+RUN groupadd -g 1000 build \
+ && useradd -u 1000 -g 1000 -m build \
+ && echo 'Defaults:build !requiretty' | tee -a /etc/sudoers \
+ && echo 'build ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers \
+ && chown build.build /usr/local/bin
+
+USER build
+RUN git clone https://git.icinga.com/build-docker/scripts.git /usr/local/bin
+ENTRYPOINT ["/usr/local/bin/icinga-build-entrypoint"]
+CMD ["icinga-build-package"]