Add Docker build tests and manual image release automation #98

Job	Run time
unit_tests (3.9)	1m 52s
unit_tests (3.10)	1m 50s
unit_tests (3.11)	3m 0s
docker_build_tests / docker_build_tests	1m 45s
py_build_tests / relative_path_tests	7s
py_build_tests / py_build_tests	11s
	8m 45s

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