ci(ut): add dockerfile

.dockerignore

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+.git/
+
+Dockerfile
+.dockerignore

Dockerfile

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+FROM debian:stable-slim AS build
+
+# libxml2-utils is needed for xmllint needed by UrTUpdater_Ded.sh
+RUN apt-get update -y && apt-get install -y libxml2-utils curl
+
+WORKDIR /ut/
+ADD updater-cfg ./
+RUN curl -sSLO 'https://raw.githubusercontent.com/FrozenSand/UrTUpdater/master/ded/UrTUpdater_Ded.sh'
+RUN bash ./UrTUpdater_Ded.sh -q
+
+
+FROM scratch
+
+COPY --from=build /ut/ /ut/
+# unfortunately, ioqauke binaries are not statically linked
+COPY --from=build /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/ 
+COPY --from=build /lib/x86_64-linux-gnu/libm.so.6 /lib/x86_64-linux-gnu/
+COPY --from=build /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/
+COPY --from=build /lib64/ld-linux-x86-64.so.2 /lib64/
+
+WORKDIR /ut/
+ENTRYPOINT ["./Quake3-UrT-Ded.x86_64"]
+EXPOSE 27960:27960/udp

updater-cfg

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+CURRENTVERSION=${CURRENTVERSION:-1}
+DOWNLOADSERVER=${DOWNLOADSERVER:-2}
+GAMEENGINE=${GAMEENGINE:-1}
+ASKBEFOREUPDATING=${ASKBEFOREUPDATING:-1}