Duplicate wildfly datasource when stopping and starting containers with docker-compose

[njmittet]

Using get https://raw.githubusercontent.com/javaee-samples/docker-java/master/attendees/docker-compose.yml

Creates containers docker-compose up -d
Stop containers: docker-compose stop
Restart containers: docker-compose start

Wildfly then tries to re-create datasource (and fails):

wildfly_1 | 
wildfly_1 | 09:11:07,802 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 4) JBAS014613: Operation ("add") failed - address: ([
wildfly_1 |     ("subsystem" => "datasources"),
wildfly_1 |     ("jdbc-driver" => "mysql")
wildfly_1 | ]) - failure description: "JBAS014803: Duplicate resource [
wildfly_1 |     (\"subsystem\" => \"datasources\"),
wildfly_1 |     (\"jdbc-driver\" => \"mysql\")
wildfly_1 | ]"