I have a Docker environment running.

To get Xdebug running, I followed the steps from this page:
<https://devdocs.magento.com/cloud/docker/docker-development-debug.html>

When I try to switch on "Start Listening for PHP Debug Connections", I get the error:

> 
> Can't start listening for connections from 'xdebug': Port 9001 is busy
> 
> 
> 

Does anybody know how to setup Magento in docker with Xdebug correctly?

EDIT:
The whole environment looks like this:

```
CONTAINER ID        IMAGE                                                COMMAND                  CREATED             STATUS                            PORTS                              NAMES
19d92752c73a        magento/magento-cloud-docker-tls:latest-1.1          "/entrypoint.sh"         4 seconds ago       Up 3 seconds                      0.0.0.0:443->443/tcp               mymagento_tls_1
b71dd39b46c3        magento/magento-cloud-docker-nginx:latest-1.1        "/docker-entrypoint.…"   4 seconds ago       Up 4 seconds (health: starting)   0.0.0.0:80->80/tcp, 443/tcp        mymagento_web_1
311e04f363b3        magento/magento-cloud-docker-php:7.3-fpm-1.1         "/docker-entrypoint.…"   5 seconds ago       Up 4 seconds (health: starting)   9000/tcp                           mymagento_fpm_1
cbdf9246f3e9        magento/magento-cloud-docker-php:7.3-fpm-1.1         "/docker-entrypoint.…"   35 seconds ago      Up 33 seconds (healthy)           9000/tcp, 0.0.0.0:9001->9001/tcp   mymagento_fpm_xdebug_1
2f1b4f2f9e23        magento/magento-cloud-docker-elasticsearch:6.5-1.1   "/usr/local/bin/dock…"   36 seconds ago      Up 35 seconds (healthy)           9200/tcp, 9300/tcp                 mymagento_elasticsearch_1
d818c0755f4c        mariadb:10.2                                         "docker-entrypoint.s…"   36 seconds ago      Up 35 seconds (healthy)           0.0.0.0:32807->3306/tcp            mymagento_db_1
19e266fbb72a        redis:5.0                                            "docker-entrypoint.s…"   36 seconds ago      Up 35 seconds (healthy)           0.0.0.0:32806->6379/tcp            mymagento_redis_1

```