Added Dockerfile

Dockerfile

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+# How to use:
+# docker build -t zeiterfassung .
+# docker run -it --rm -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix -v $HOME/.config/db-software:/root/.config/db-software --net host zeiterfassung
+
+# Troubleshooting:
+# X-Server permission errors: xhost +SI:localuser:root
+
+
+FROM archlinux/base
+
+RUN pacman -Sy --noconfirm qt5-base qt5-multimedia
+
+RUN pacman -S --noconfirm git gcc make cmake qt5-tools qt5-translations
+
+RUN cd /opt \
+ && git clone https://github.com/0xFEEDC0DE64/DbSoftware.git \
+ && cd DbSoftware \
+ && git submodule update --init --recursive 3rdparty/Quazip DbSketch libs/DbCoreLib libs/DbGuiLib libs/DbNetworkLib
+
+ADD . /opt/DbSoftware/DbZeiterfassung
+
+RUN mkdir /opt/build_DbSoftware \
+ && cd /opt/build_DbSoftware \
+ && cmake ../DbSoftware \
+ && make -j8 zeiterfassung
+
+
+
+FROM archlinux/base
+
+RUN pacman -Sy --noconfirm qt5-base qt5-multimedia
+
+RUN pacman -S --noconfirm ttf-dejavu
+
+COPY --from=0 /opt/build_DbSoftware /opt/build_DbSoftware
+
+CMD /opt/build_DbSoftware/bin/zeiterfassungclient