add monitoring

config/health/resources/MySqlConnectable.yml

@@ -0,0 +1,12 @@
+name: MySQL Connectable
+abbreviation: mysqlgrsqlsrvrconn
+checker: PragmaRX\Health\Checkers\PortCheck
+notify: true
+column_size: 3
+error_message: "Could not connect to %s on port %s"
+targets:
+  - default:
+      name: mysql
+      hostname: mysql
+      port: 3306
+      timeout: 2