I used the stand alone yml in which I set SMTP to my gmail account and discourse hostname to localhost.
I can log into the virtual box running image and confirm it is still running.
I followed this install guide except I installed to docker on my laptop instead of on Digital Ocean. Internet is too patchy where I live to develop online. I’d be offline for a day some times.
https://www.digitalocean.com/community/tutorials/how-to-install-discourse-on-ubuntu-14-04