support old cmake versions with finding boost

deploy/appimage/Dockerfile

@@ -62,6 +62,8 @@ COPY ./*.h ./*cpp ./*.ui ./*.qrc CMakeLists.txt .
 RUN mkdir build
 WORKDIR /appimage/build
 
+RUN DEBIAN_FRONTEND=noninteractive apt install -y libboost-regex-dev
+
 RUN cmake -DBUILD_TRANSLATIONS=on .. && make -j 8
 
 WORKDIR /appimage/AppDir/usr/bin
@@ -73,5 +75,4 @@ WORKDIR /appimage
 RUN PATH=/usr/lib/qt5/bin/:$PATH linuxdeployqt --appimage-extract-and-run AppDir/usr/bin/checks-parser -no-copy-copyright-files -appimage
 
 RUN mkdir -p /output
-RUN cp Checks_parser-x86_64.AppImage /output
-ENTRYPOINT bash
+ENTRYPOINT ["cp", "Checks_parser-x86_64.AppImage", "/output"]