Optimized LDAP integration, keycloak realm import and health checks for docker images

roles/docker-keycloak/templates/docker-compose.yml.j2

@@ -4,11 +4,19 @@ services:
 
   application:
     image: quay.io/keycloak/keycloak:{{applications.keycloak.version}}
-    command: start
+    container_name: {{container_name}}
+    command: start --import-realm # imports realms on startup
     {% include 'roles/docker-compose/templates/services/base.yml.j2' %}
     ports:
       - "127.0.0.1:{{http_port}}:8080"
+    volumes:
+      - "{{import_directory_host}}:{{import_directory_docker}}"
 {% include 'templates/docker/container/depends-on-just-database.yml.j2' %}
 {% include 'templates/docker/container/networks.yml.j2' %}
+    healthcheck:
+      test: ["CMD", "sh", "-c", "exec 3<>/dev/tcp/localhost/9000 && echo -e 'GET /health/live HTTP/1.1\\r\\nHost: {{domains.keycloak}}\\r\\nConnection: close\\r\\n\\r\\n' >&3 && cat <&3"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
 
 {% include 'templates/docker/compose/networks.yml.j2' %}

roles/docker-keycloak/templates/env.j2

@@ -1,6 +1,15 @@
+# Environment File for Keycloak 
+# Documentation can be found here: 
+# @see https://www.keycloak.org/server/containers
+
 KC_HOSTNAME=                    https://{{domain}}
 KC_HTTP_ENABLED=                true
+
+# Health Checks
+# @see https://quarkus.io/guides/smallrye-health
 KC_HEALTH_ENABLED=              true
+KC_METRICS_ENABLED=             true
+
 KEYCLOAK_ADMIN=                 "{{applications.keycloak.administrator_username}}"
 KEYCLOAK_ADMIN_PASSWORD=        "{{applications.keycloak.administrator_password}}"
 KC_DB=                          postgres