Rationalise bucket creation (#211)

* chore: shorten bucket names to fit limits and fix source bucket prefix

* chore: use local var for setting aws provider region

terraform/fargate-examples/queue-processing/main.tf

@@ -1,5 +1,5 @@
 provider "aws" {
-  region = "us-west-2"
+  region = local.region
 }
 
 data "aws_caller_identity" "current" {}
@@ -108,7 +108,7 @@ module "source_s3_bucket" {
   source  = "terraform-aws-modules/s3-bucket/aws"
   version = "~> 3.15"
 
-  bucket = "${local.name}-source-${local.region}-"
+  bucket_prefix = "${local.name}-src-${local.region}-"
 
   # For example only - please evaluate for your environment
   force_destroy = true
@@ -131,7 +131,7 @@ module "destination_s3_bucket" {
   source  = "terraform-aws-modules/s3-bucket/aws"
   version = "~> 3.15"
 
-  bucket_prefix = "${local.name}-destination-${local.region}-"
+  bucket_prefix = "${local.name}-dst-${local.region}-"
 
   # For example only - please evaluate for your environment
   force_destroy = true