fix: new env format

Author: agus-darmawan

.env.example

@@ -4,8 +4,9 @@ POSTGRES_USER=keycloak
 POSTGRES_PASSWORD=keycloak_password
 
 # Keycloak Admin
-KEYCLOAK_ADMIN=admin
-KEYCLOAK_ADMIN_PASSWORD=admin123
+KC_BOOTSTRAP_ADMIN_USERNAME=admin
+KC_BOOTSTRAP_ADMIN_PASSWORD=admin123
+KEYCLOAK_PORT=8080
 
 # Database
 KC_DB=postgres

docker-compose.yml

@@ -20,7 +20,7 @@ services:
     env_file:
       - .env
     ports:
-      - "8080:8080"
+      - "${KEYCLOAK_PORT}:8080"
     depends_on:
       postgres:
         condition: service_healthy