Merge branch 'update-pipeline-in-episode-5' into 'ci-episode-5-exercise-1-remove-redundancies-in-ci-pipeline'

Update GCC versions to more recent versions in CI pipeline in episode 5

See merge request !27

Merge branch '6-ci-episode-5-exercise-1-remove-redundancies-in-ci-pipeline-updated' into 'ci-episode-5-exercise-1-remove-redundancies-in-ci-pipeline'

Improve consistency with workshop materials and example project for episode 5 - removing redundancy

See merge request !22

* Use python:3.11 image and gcc:11 and gcc:12 image in CI pipeline.
* GoogleTest v1.13.0 supports only C++ >= 14. This requirement is
  not met with gcc:10, hence remove CI jobs with gcc:10 image.

* Reorder keywords in CI jobs and put extends keyword first.
* Use Python 3.10 as default base image.
* Use full path to executable of exercise app when calling app.

* Remove redundancies from CI pipeline by using defaults, extends
and matrix keywords.

* Use python:3.11 image and gcc:11 and gcc:12 image in CI pipeline.
* GoogleTest v1.13.0 supports only C++ >= 14. This requirement is not
  met with gcc:10, hence remove CI jobs with gcc:10 image.

* Use Python 3.10 as base images.
* Change path to executable when calling exercise app in job run.

* New CI jobs are license_compliance, lint, build, test, run.

* Re-add CI pipeline with initial CI job that builds and runs the
application.

Adapt README regarding CMake minimum version

See merge request hifis/software/education/hifis-workshops/gitlab-ci/exercise-project!18

* CMake minimum version has been decreased.

Downgrade CMake requirements to 3.14

See merge request !17

* CMake need not be used in the lastest version 3.26.

Update project dependencies like cmake and cpp

Closes #4

See merge request hifis/software/education/hifis-workshops/gitlab-ci/exercise-project!12

* Update information in file README and file CMakeLists.txt to use cmake
  3.26 and C++14.
* Add information on how to install cmake.
* Use different GoggleTest URL for newest Git tag v1.13.0.

Fix instructions in file README

Closes #2

See merge request hifis/software/education/gitlab-ci/exercise-project!10

* Built executable is located in folder ./build/bin/ now.

Put executable into bin directory during build

See merge request hifis/software/education/gitlab-ci/exercise-project!4

* The built executable should be put into the bin folder.

Fix linting violations and errors in cmake project

Closes #1

See merge request hifis/software/education/gitlab-ci/exercise-project!2

* Fixed style guide violations detected by cpplint.
* Fixed errors in the cmake project when building the project.