flowchart LR
    W((World)) --- TR
    TR --- KC(Keycloak)
    BB --- KC
    subgraph Nomad
    TR(Traefik proxy) --- BB
    BB(Biblio backend) --- NATS{NATS}
    NATS --- JB{JMS bridge}
    JB --- F(Fedora repository)
    NATS --- IDX(Indexer service)
    IIIF(IIIF image server)
    end
    F --- PG[(Postgres cluster)]
    F --- S3[(S3 or FS storage)]
    BB --- ES[(Elasticsearch cluster)]
    IDX --- F