Update MySQL healthcheck password in compose.yml

Author: noobdevsam

compose.yml

@@ -11,7 +11,7 @@ services:
             - MYSQL_USER=user
             - MYSQL_PASSWORD=password
         healthcheck:
-            test: [ "CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-p${MYSQL_ROOT_PASSWORD}" ]
+            test: [ "CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "-ppassword" ]
             interval: 10s
             timeout: 5s
             retries: 5