👷 Add CI pipeline

.drone.yml

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+kind: pipeline
+name: default
+
+steps:
+  - name: build
+    image: git.aksdb.de/aksdb/centred:builder-220724
+    commands:
+      - ~/lazarus/lazbuild --lazarusdir=~/lazarus --build-mode="Release.win32" -B Client/CentrED.lpr
+      - ~/lazarus/lazbuild --lazarusdir=~/lazarus --build-mode="Release.Linux.x64" -B Client/CentrED.lpr
+      - ~/lazarus/lazbuild --lazarusdir=~/lazarus --build-mode="Release.win32" -B Server/cedserver.lpi
+      - ~/lazarus/lazbuild --lazarusdir=~/lazarus --build-mode="Release.Linux.x64" -B Server/cedserver.lpi

Dockerfile.builder

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+FROM ubuntu:jammy
+
+RUN apt update && \
+	apt install -y libgtk2.0-dev libgl-dev binutils-mingw-w64-i686 git wget && \
+	rm -rf /var/lib/apt/lists/* && \
+	ln -s /usr/bin/i686-w64-mingw32-windres /usr/bin/i386-win32-windres && \
+	ln -s /usr/bin/i686-w64-mingw32-windres /usr/bin/windres
+
+RUN cd /root && \
+	export FPCVERSION=3.2.2 && \
+	export LAZVERSION=2.2.2 && \
+	wget --content-disposition https://sourceforge.net/projects/freepascal/files/Linux/$FPCVERSION/fpc-$FPCVERSION.x86_64-linux.tar/download && \
+	wget --content-disposition https://sourceforge.net/projects/freepascal/files/Source/$FPCVERSION/fpc-$FPCVERSION.source.tar.gz/download && \
+	tar xf fpc-$FPCVERSION.x86_64-linux.tar && \
+	cd fpc-$FPCVERSION.x86_64-linux && \
+	echo "/usr" | ./install.sh && \
+	cd .. && \
+	tar xf fpc-$FPCVERSION.source.tar.gz && \
+	cd fpc-$FPCVERSION && \
+	make crossinstall INSTALL_PREFIX=/usr OS_TARGET=win32 CPU_TARGET=i386 && \
+	make clean && \
+	ln -s /usr/lib/fpc/$FPCVERSION/ppcross386 /usr/bin/ppcross386 && \
+	cd .. && \
+	wget --content-disposition https://sourceforge.net/projects/lazarus/files/Lazarus%20Zip%20_%20GZip/Lazarus%20$LAZVERSION/lazarus-$LAZVERSION-0.tar.gz/download && \
+	tar xf lazarus-$LAZVERSION-0.tar.gz && \
+	cd lazarus && \
+	make lazbuild && \
+	cd /root && \
+	rm -rf *.tar.gz fpc-$FPCVERSION*
+
+RUN cd /root && \
+	git clone --depth 1 https://github.com/blikblum/multilog && \
+	git clone --depth 1 https://github.com/almindor/lnet && \
+	~/lazarus/lazbuild --lazarusdir=~/lazarus --add-package-link ~/multilog/multiloglaz.lpk && \
+	~/lazarus/lazbuild --lazarusdir=~/lazarus --add-package-link ~/lnet/lazaruspackage/lnetbase.lpk && \
+	~/lazarus/lazbuild --lazarusdir=~/lazarus --add-package-link ~/lnet/lazaruspackage/lnetvisual.lpk