Merge branch 'release-0.1' into 'main'

.docker/Dockerfile

.docker/cert.sh

.docker/docker-compose.yml

.docker/run.sh

.docker/sss_pycaosdb.ini

.docker/tester.yml

.docker/tester_pycaosdb.ini

.docker/wait-for-it.sh

.gitignore

.gitlab-ci.yml

.gitmodules

CHANGELOG.md

Makefile

README.md

RELEASE_GUIDELINES.md

concept.md

integrationtests/README.md

integrationtests/basic_example/model.yml

integrationtests/basic_example/test_basic.py

integrationtests/pycaosdb.ini