Switched to full static release + enable lto for the docker release image

src/libs/core/CMakeLists.txt

@@ -1,7 +1,7 @@
 pkg_check_modules(Config++ REQUIRED IMPORTED_TARGET libconfig++)
 pkg_check_modules(Archive REQUIRED IMPORTED_TARGET libarchive)
 
-add_library(lmscore SHARED
+add_library(lmscore STATIC
 	impl/http/Client.cpp
 	impl/http/SendQueue.cpp
 	impl/ArchiveZipper.cpp
@@ -42,8 +42,6 @@ target_link_libraries(lmscore PUBLIC
 	Wt::Wt
 	)
 
-install(TARGETS lmscore DESTINATION ${CMAKE_INSTALL_LIBDIR})
-
 if(BUILD_TESTING)
 	add_subdirectory(test)
 endif()