add env var for max pinned toots

app/validators/status_pin_validator.rb

@@ -5,6 +5,6 @@ class StatusPinValidator < ActiveModel::Validator
     pin.errors.add(:base, I18n.t('statuses.pin_errors.reblog')) if pin.status.reblog?
     pin.errors.add(:base, I18n.t('statuses.pin_errors.ownership')) if pin.account_id != pin.status.account_id
     pin.errors.add(:base, I18n.t('statuses.pin_errors.private')) unless %w(public unlisted).include?(pin.status.visibility)
-    pin.errors.add(:base, I18n.t('statuses.pin_errors.limit')) if pin.account.status_pins.count > 4 && pin.account.local?
+    pin.errors.add(:base, I18n.t('statuses.pin_errors.limit')) if pin.account.status_pins.count >= (ENV['MAX_PINNED_TOOTS'].to_i || 5) && pin.account.local?
   end
 end