Sometimes it is way too early in the development cycle to set up automated (or not) deployment just to get some feedback; this is where tunnels come in:
connect command needs only one argument that specifies destination:
relay connect [DESTINATION]
In the next example we demonstrate tunnels functionality with custom subdomains and automated SSL:
To get a custom subdomain and enable SSL you need to specify two flags:
relay connect --subdomain [SUBDOMAIN] --crypto flexible [DESTINATION]
flexible enables both HTTP and HTTPS endpoints.
More details are available in tunnels documentation page.