+ additional doc for detect your gateway/host ip in docker network and describe how to ufw allow appropriate ports

.env.example

@@ -1,5 +1,7 @@
-# Enter your Docker Host IP (will be appended to /etc/hosts). Default is `10.0.75.1`
-DOCKER_HOST_IP=172.20.0.1
+# Enter your gateway IP (your host IP under from docker containers) - that need for correctly worked xdebug from cli
+# For detect that IP use: docker network inspect structure_default | grep Gateway | xargs | cut -d ' ' -f2
+# For UFW allowing ports on the host system: ufw allow to 172.18.0.1 port 9000,9003
+DOCKER_HOST_IP=172.18.0.1
 PROJECTS_DIR=/home/youruser/PhpstormProjects
 
 ### Common ###############################################