Control Sandbox SMTP server based on DynamoDB config, save config on app register from Saleor data#2292

witoszekdev wants to merge 9 commits intomainsaleor/apps:mainfrom

eng-1402-add-support-for-smtp-app-additional-register-datasaleor/apps:eng-1402-add-support-for-smtp-app-additional-register-dataCopy head branch name to clipboard