Remove old files

[m9p909]

• each code should have an expiration date in db
• default should be 1 month
• the Nest backend or a lambda should be triggered nightly with a lambda or api call to clean the database and s3 buket
• Database records of expired files should be deleted
• expired files should be removed from s3

[m9p909]

Need to figure out how to do aws cron jobs