chore: release 0.12.0 #16

Job	Run time
Calculate list of debian distros and docker image tags	5s
build_and_test_backend / pylint	31s
build_and_test_backend / mypy	38s
build_and_test_backend / test (3.10, ubuntu-latest)	1m 41s
build_and_test_backend / format	23s
build_and_test_backend / test (3.11, ubuntu-latest)	1m 37s
build_and_test_frontend / build-app	6m 22s
build_and_test_frontend / build-web	1m 24s
build_and_test_frontend / format	42s
build_and_test_frontend / lint	55s
build_and_test_frontend / test	46s
Build and publish ready made docker containers	3m 9s
Build .deb packages (debian:bookworm)	3m 46s
Deploy demo application	21s
Attach assets to release	0s
	22m 20s

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