Hi,
I have a question - How can I update nginx.conf or discourse.conf without having it reset when the container is rebuilt?
I edit the file using nano, save it. But when I rebuild the app, the original file is there instead of the updated one. Can someone help please? 
You have to use replace commands in your app.yml to make the edits to the config files as part of the build process. There’s lots of examples in the discourse_docker repo.
@mpalmer Thank you so much! That solved my issue. I will try and learn more about formatting through yml.
I have just one more question if you can - which file do I need to replace the repo links in if I am using a custom repo of discourse? Is the default repo hardcoded in any conf file?
Thanks!