Merge branch 'stable' into Heanet/xml_tmp_update

.drone.yml

.gitignore

.gitmodules

README.md

config/opennsa.conf.template

docs/requirements-for-pip.txt

requirements.txt

website/.nvmrc

website/CONTRIBUTING.md

website/Dockerfile

website/README.md

website/assets/scss/_variables_project.scss

website/config.toml

website/content/_index.html

website/content/about/_index.disabled

website/content/about/featured-background.jpg

website/content/docs/Developer/Backends/_index.md

website/content/docs/Developer/Backends/brocade.md

website/content/docs/Developer/_index.md

website/content/docs/Developer/developer_guide.md