Are we sure we want to put all environment variables in our Repository settings?

[jfly]

I was trying to find out where WCA_HOST (used in deploy.sh) is defined, and it took me a while to find that it's defined over in https://travis-ci.org/thewca/wca-documents/settings. What's even weirder is that I can't actually see the value of the variable, it's just some dots:

I'd argue that this is perfectly safe to put in our .travis.yml file.

https://docs.travis-ci.com/user/environment-variables/ has some advice about where to put environment variables, and I feel like $WCA_HOST falls under the category of "if it does not contain sensitive information, might be different for different branches and should be available to forks – add it to your .travis.yml".

[jonatanklosko]

I extracted it as a variable in case we want to test things on the staging first (e.g. deployment changes). That's what I did before this went live - set it to staging.worldcubeassociation.org

It may make sense to make this env variable visible under settings (when adding an new one you can make it hidden or visible).