Merge branch 'staging' into 'production'

.gitlab-ci.yml

ci-tools/count-vulnerabilities

ci-tools/known_hosts.production

ci-tools/known_hosts.staging

ci-tools/update-grid-servers

ci-tools/vulnerability-scan

docs.nix

docs/source/ops/generating-keys.rst

morph/README.rst

morph/grid/local/README.rst

morph/grid/local/Vagrantfile

morph/grid/local/config.json

morph/grid/local/grid.nix

morph/grid/local/private-keys/README.rst

morph/grid/local/private-keys/deploy_key

morph/grid/local/private-keys/grafana-admin.password

morph/grid/local/private-keys/monitoringvpn/172.23.23.11.key

morph/grid/local/private-keys/monitoringvpn/172.23.23.12.key

morph/grid/local/private-keys/monitoringvpn/172.23.23.13.key

morph/grid/local/private-keys/monitoringvpn/preshared.key