Prepare redesign for public deployment

.env.example

@@ -1,6 +1,8 @@
 SECRET_KEY=replace-this-with-a-long-random-string
+APP_ENV=production
 DATABASE_URL=postgresql+psycopg://user:password@host/dbname
 APP_BASE_URL=https://myboker.org
+RATELIMIT_STORAGE_URI=redis://localhost:6379/0
 MAIL_SERVER=smtp.sendgrid.net
 MAIL_PORT=587
 MAIL_USE_TLS=true