Before starting a migration, it is important to define the nonfunctional requirements for the migrated application. These requirements will help with making architectural decisions during the migration process.

Our example application has the following nonfunctional requirements:

• The application environments should scale to zero and scale up automatically.
• We should pay as little as possible for idle time.
• Our developers should configure as little infrastructure as possible.
• The application should have automatic high availability.
• We should make minimal changes to the original application code.