Update Keycloak deployment for Dokploy with reverse proxy support (#402)

* Update KC envs and bump version

use the v2 ENV Variables like KC_BOOTSTRAP_ADMIN_USERNAME

* Update blueprints/keycloak/docker-compose.yml

* Update blueprints/keycloak/docker-compose.yml

---------

Co-authored-by: Mauricio Siu <47042324+Siumauricio@users.noreply.github.com>

blueprints/keycloak/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   postgres:
     image: postgres:16.2
@@ -9,24 +7,29 @@ services:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
     volumes:
       - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
     restart: always
-
+    
   keycloak:
-    image: quay.io/keycloak/keycloak:26.0
+    image: quay.io/keycloak/keycloak:26.3.5
+    depends_on:
+      postgres:
+        condition: service_healthy
     environment:
       KC_DB: postgres
       KC_DB_URL: jdbc:postgresql://postgres:5432/${POSTGRES_DB}
       KC_DB_USERNAME: ${POSTGRES_USER}
       KC_DB_PASSWORD: ${POSTGRES_PASSWORD}
-      KEYCLOAK_ADMIN: ${KEYCLOAK_ADMIN}
-      KEYCLOAK_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
-      KC_HOSTNAME: ${KC_HOSTNAME}
-      KC_HOSTNAME_PORT: 8080
-      KC_HTTP_ENABLED: true
-      KC_HOSTNAME_STRICT_HTTPS: false
-      KC_HEALTH_ENABLED: true
-    depends_on:
-      - postgres
+      KC_BOOTSTRAP_ADMIN_USERNAME: ${KEYCLOAK_ADMIN}
+      KC_BOOTSTRAP_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
+      KC_HOSTNAME: ${KC_HOSTNAME}      
+      KC_HTTP_ENABLED: "true"               
+      KC_HEALTH_ENABLED: "true"
+      KC_PROXY_HEADERS: "xforwarded"
     command: start-dev
     restart: always