Replace MySQL Keycloak DB with Postgres

docker-compose.yml

@@ -10,27 +10,26 @@ services:
     healthcheck:
       test: echo 'db.stats().ok' | mongosh localhost:27017/moviesdb --quiet
 
-  mysql:
-    image: mysql:5.7.41
-    container_name: mysql
+  postgres:
+    image: postgres:15.2
+    container_name: postgres
     ports:
-      - "3306:3306"
+      - "5432:5432"
     environment:
-      - MYSQL_DATABASE=keycloak
-      - MYSQL_USER=keycloak
-      - MYSQL_PASSWORD=password
-      - MYSQL_ROOT_PASSWORD=root_password
+      - POSTGRES_DB=keycloak
+      - POSTGRES_USER=keycloak
+      - POSTGRES_PASSWORD=password
     healthcheck:
-      test: "mysqladmin ping -u root -p$${MYSQL_ROOT_PASSWORD}"
+      test: "pg_isready -U postgres"
 
   keycloak:
     image: quay.io/keycloak/keycloak:21.0.1
     container_name: keycloak
     environment:
       - KEYCLOAK_ADMIN=admin
       - KEYCLOAK_ADMIN_PASSWORD=admin
-      - KC_DB=mysql
-      - KC_DB_URL_HOST=mysql
+      - KC_DB=postgres
+      - KC_DB_URL_HOST=postgres
       - KC_DB_URL_DATABASE=keycloak
       - KC_DB_USERNAME=keycloak
       - KC_DB_PASSWORD=password
@@ -39,6 +38,6 @@ services:
       - "8080:8080"
     command: start-dev
     depends_on:
-      - mysql
+      - postgres
     healthcheck:
       test: "curl -f http://localhost:8080/health/ready || exit 1"