feat(elk): add Traefik configuration for Elasticsearch service

modules/elk/jobspec.nomad.hcl

@@ -82,6 +82,16 @@ job "elk" {
         name     = "elk-node-elasticsearch-http"
         provider = "consul"
         port     = "http"
+
+        tags = [
+          "traefik.enable=true",
+          "traefik.http.routers.es.rule=Host(`es.brmartin.co.uk`)",
+          "traefik.http.routers.es.entrypoints=websecure",
+          "traefik.http.routers.es.service=es",
+          "traefik.http.services.es.loadbalancer.serversTransport=es",
+          "traefik.http.serversTransports.es.rootCAs=[\"/etc/traefik/rootca/elasticsearch.crt\"]",
+          "traefik.http.serversTransports.es.insecureSkipVerify=true", # TODO: Hostname verification will fail without this
+        ]
       }
 
       service {