Import OSCW runner

Dockerfile

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+FROM archlinux:latest
+MAINTAINER CodingWorkshop <constitutive@codingworkshop.eu.org>
+
+# Update system base
+RUN pacman -Syu --noconfirm --noprogressbar --quiet
+
+# Install additional packages
+RUN pacman -Syu --noconfirm --noprogressbar --quiet autoconf automake binutils bison cppcheck docker flex gcc git libedit libmd linux-headers patch pkgconfig texinfo wget 
+
+# Set locale
+RUN echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen && \
+	echo 'LANG=en_US.UTF-8' > /etc/locale.conf && \
+	locale-gen
+
+# Install Docker-in-Docker
+ENV DIND_COMMIT 3b5fac462d21ca164b3778647420016315289034
+RUN wget "https://raw.githubusercontent.com/docker/docker/${DIND_COMMIT}/hack/dind" -O /usr/local/bin/dind && \
+	chmod a+x /usr/local/bin/dind
+
+# Configure Docker-in-Docker
+COPY files/entrypoint.sh /usr/local/bin/
+RUN chmod a+x /usr/local/bin/entrypoint.sh
+VOLUME /var/lib/docker
+EXPOSE 2375
+
+# Install XT toolchain
+RUN wget https://github.com/xt-sys/xtchain/releases/download/2.2/xtchain-2.2-linux.tar.zst -O xtchain.tar.zst && \
+	mkdir -p /opt/xtchain && \
+	tar xapf xtchain.tar.zst -C /opt/xtchain && \
+	rm xtchain.tar.zst
+
+# Install GitHub publishing script
+COPY files/github_publish /usr/local/bin/
+RUN chmod a+x /usr/local/bin/github_publish
+
+# Set system path
+ENV PATH="/opt/xtchain:/opt/xtchain/bin:${PATH}"
+
+# Set default entrypoint
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+CMD []