Improve CI/CD and deployment configuration

.dockerignore

.github/workflows/docker-build.yml

.gitlab-ci.yml

.gitlab/bin/dokku-ci-post-deploy.sh

.gitlab/bin/dokku.sh

.gitlab/ci/deploy-parallel-matrix.gitlab-ci.yml

.gitlab/ci/deploy-template.gitlab-ci.yml

.gitlab/dokku-ci-post-deploy.sh

Dockerfile

readme.md

src/main/resources/application-csui.properties