Added basic support for keycloak

.gitignore

gui/package.json

gui/src/components/LoginLogout.js

gui/src/index.js

gui/yarn.lock

nomad/config.py

nomad/infrastructure.py

nomad/utils.py

ops/docker-compose/nomad/docker-compose.override.yml

ops/docker-compose/nomad/docker-compose.prod.yml

ops/docker-compose/nomad/docker-compose.yml

requirements.txt