Set the locale for the steam container

[Sparticuz]

gow-steam-1 | WARNING: setlocale('en_US.UTF-8') failed, using locale: 'C'. International characters may not work.

[zb140]

Looks like we need to install the locales package and run locale-gen en_US.UTF-8 as part of the build process.

[zb140]

It really seems like this should be easy to fix, but for some reason, it isn't. I can fix it with the steps I mentioned above in a container that already exists, but when I try to add those steps to the container build, it doesn't seem to consistently fix the problem. So, this bug is still open. But I haven't given up yet 😁