I think that might have been added when watched words were first being tested and just never got removed.
Yeah. I get confused about that often. In fact, I think that’s probably why once when I tried to just rename things to switch from single to double-container I got the underscore/dash thing wrong and it failed.
And worse, I am pretty sure it’s my fault. I got some error when I created the two-container option in discourse-setup (maybe containers couldn’t have underscores?) Ruby likes underscores in filenames, so maybe that’s why I used an underscore there? I think that’s it–and I think web_only can’t work as a docker container name since they also need to be valid hostnames.