- Add healthcheck example in compose file.

compose.yaml

@@ -30,6 +30,12 @@ services:
       MARIADB_USER:          ${MARIADB_USER}
       MARIADB_PASSWORD:      ${MARIADB_PASSWORD}
       
+    healthcheck:
+      test: ["CMD", 'mysqladmin', 'ping', '-h', 'localhost', '-u', 'root', '-p${MARIADB_ROOT_PASSWORD}' ]
+      interval: 10s
+      timeout: 3s
+      retries: 3
+      
     volumes:
       - ./var/lib/mysql:/var/lib/mysql