Merge branch 'release/v0.6.3' into 'master'

.gitlab-ci.yml

CMakeLists.txt

Dockerfile

src/CMakeLists.txt

src/data/data_manager.cpp

src/data/data_manager.hpp

src/data/graph.hpp

src/data/nodes/applied_bonus_points.cpp

src/data/nodes/applied_bonus_points.hpp

src/data/nodes/bonus_points.cpp

src/data/nodes/bonus_points.hpp

src/data/nodes/dynexite_exam.cpp

src/data/nodes/dynexite_exam.hpp

src/data/nodes/first_try.cpp

src/data/nodes/first_try.hpp

src/data/nodes/grade_list.cpp

src/data/nodes/grade_list.hpp

src/data/nodes/student_data.cpp

src/data/nodes/student_data.hpp

src/data/nodes/student_points.cpp