Hardcode password in healthcheck for testing

docker-compose.yml

@@ -13,7 +13,7 @@ services:
       - ./src/main/resources:/docker-entrypoint-initdb.d
     # --- BEGIN HEALTHCHECK ---
     healthcheck:
-      test: ["CMD", "mariadb-admin", "ping", "-h", "localhost", "-u", "root", "-p${MYSQL_ROOT_PASSWORD}"]
+      test: ["CMD", "mariadb-admin", "ping", "-h", "localhost", "-u", "root", "-pcomsc"] # Hardcoded password
       interval: 10s
       timeout: 5s
       retries: 5