In certain cases you may need to share or expose you local web server on the internet. E.g. share access with a teammate or customer to demonstrate the work or discuss the progress. Working with external web services that expect a callback URL is also generally not possible with a local environment.
ngrok creates a tunnel from the public internet http://subdomain.ngrok.com to a port on your local machine. You can give this URL to anyone to allow them to try out a web site you're developing without doing any deployment.
Uncomment the share service definition section in docker-compose.yml to start using ngrok.
To get the *.ngrok.com address, check the container's logs:
docker-compose logs share
The ngrok web inspection interface is running on port 4040. E.g. http://192.168.10.10:4040