Make it easier to get up and running

The site needs a default "single club mode" set in the env, to create a single club by default and tie all auctions to that with auto-add or checkin mode (don't show the club picker in auction rules, don't allow manage members through the club to be off). In this mode, any user account would create a club member for this club automatically. That club would also not allow oauth paypal, just enable the pp .env setting by default Then we need to work with some/all of the env not present, right now some stuff like google analyticis still tries to fire with the default setting from .env.example, recaptcha should fail out by removing itself from the signup signin forms and printing an error to the console, etc. We also need to redo the readme, it's very long and there's a lot of stuff going on in it