Add social features and harden beta release

db/migrations/09_profile_privacy_and_flyer_links.sql

@@ -0,0 +1,12 @@
+ALTER TABLE users
+ALTER COLUMN profile_visibility SET DEFAULT 'friends';
+
+ALTER TABLE users
+DROP CONSTRAINT IF EXISTS users_profile_visibility_check;
+
+ALTER TABLE users
+ADD CONSTRAINT users_profile_visibility_check
+CHECK (profile_visibility IN ('public', 'friends', 'nobody'));
+
+ALTER TABLE concerts
+ADD COLUMN IF NOT EXISTS flyer_url TEXT;