feat: added keycloak metrics endpoint (#19)

Author: TheSlimvReal

keycloak/Dockerfile

@@ -1,7 +1,9 @@
 # Inspired by https://www.keycloak.org/server/containers
 FROM quay.io/keycloak/keycloak:19.0.1 as builder
 ARG KC_DB=postgres
+RUN curl -L https://github.com/aerogear/keycloak-metrics-spi/releases/download/3.0.0/keycloak-metrics-spi-3.0.0.jar > /opt/keycloak/providers/keycloak-metrics-spi.jar
 RUN /opt/keycloak/bin/kc.sh build
 
 FROM quay.io/keycloak/keycloak:19.0.1
 COPY --from=builder /opt/keycloak/lib/quarkus/ /opt/keycloak/lib/quarkus/
+COPY --from=builder /opt/keycloak/providers/keycloak-metrics-spi.jar /opt/keycloak/providers/

keycloak/realm_config.json

@@ -21,6 +21,10 @@
     "user": "<EMAIL_SERVER_USER>",
     "password": "<EMAIL_SERVER_PASSWORD>"
   },
+  "eventsListeners": [
+    "metrics-listener",
+    "jboss-logging"
+  ],
   "roles": {
     "realm": [
       {