Terraform IaC

[bleggett]

Will stand up CoEpi AWS infra when pointed at an AWS account using Terraform.

• Had to modify the OpenAPI spec to include x-amazon-apigateway-integration hints - it's an AWS limitation that you either have to manage integrations/methods outside of the OpenAPI spec with TF/Cloudformation, or you have to encode extension hints in the spec directly, no mix and match allowed.

• Updated the codebase to compile with Gradle 6 and OpenJDK 13 - this also allows us to target the java11 runtime in Lambda.

• We can easily extend this Terraform code to work with non-Java lambdas too.

• README.md has been updated with new steps for deployment.

[bleggett]

TBC

• Jar file reference needs to be less fragile
• Internal error with the Lambda on post - can confirm it is correctly invoked so it's a code error I think.

[bleggett]

@bhushanRamnani Comments addressed - ready when you are.