Add Dockerfile for new doc generation container

- based on ubuntu 22.04 LTS
- all tools installed for html and pdf generation

closes: #59

dev_env/ubuntu/doc_base/22.04/Dockerfile

@@ -0,0 +1,39 @@
+FROM	ubuntu:22.04
+ENV	DEBIAN_FRONTEND=noninteractive
+RUN 	apt-get update && \
+	apt-get upgrade -y
+RUN	apt-get install -y \
+	autoconf \
+	autoconf-archive \
+	automake \
+	autotools-dev \
+	net-tools \
+	bison \
+	curl \
+	flex \
+	git \
+	sudo \
+	vim \
+	wget \
+	python3-docutils  \
+	python3-pip \
+	python3-pysnmp4
+RUN	apt-get install -y \
+	texlive-base \
+	texlive-latex-base \
+	texlive-latex-extra \
+	texlive-latex-recommended \
+	texlive-extra-utils \
+	texlive-fonts-recommended \
+	texlive-lang-other \
+	texlive-luatex \
+	texlive-xetex \
+	latexmk
+RUN	pip install sphinx sphinx_rtd_theme rst2pdf
+VOLUME	/rsyslog
+RUN	groupadd rsyslog \
+	&& useradd -g rsyslog -s /bin/bash rsyslog \
+	&& echo "rsyslog ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers \
+	&& echo "buildbot ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+WORKDIR	/rsyslog
+USER	rsyslog

dev_env/ubuntu/doc_base/22.04/build.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+# Use --no-cache to rebuild image
+docker build $1 -t rsyslog/rsyslog_dev_doc_base_ubuntu:22.04 .
+printf "\n\n================== BUILD DONE\n"

dev_env/ubuntu/doc_base/22.04/run.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+printf "\n\n================== ENTER DOCKER CONTAINER\n"
+
+if [ "$RSYSLOG_HOME" == "" ]; then
+        export RSYSLOG_HOME=$(pwd)
+        echo info: RSYSLOG_HOME not set, using $RSYSLOG_HOME
+fi
+
+printf 'user ids: %s:%s\n' $(id -u) $(id -g)
+printf 'container_uid: %s\n' ${RSYSLOG_CONTAINER_UID--u $(id -u):$(id -g)}
+printf 'container cmd: %s\n' $*
+
+# Run docker
+docker run \
+	--privileged \
+	--cap-add=SYS_ADMIN \
+	-e ENVTODO \
+	${RSYSLOG_CONTAINER_UID--u $(id -u):$(id -g)} \
+	$DOCKER_RUN_EXTRA_FLAGS \
+	-v "$RSYSLOG_HOME":/rsyslog \
+	-ti --rm rsyslog/rsyslog_dev_doc_base_ubuntu:22.04