add content hash to s3 key

Author: timburke-hackit

terraform/modules/api-ingestion-lambda/10-lambda.tf

@@ -122,15 +122,12 @@ data "archive_file" "lambda" {
 }
 
 resource "aws_s3_object" "lambda" {
-  bucket      = var.lambda_artefact_storage_bucket
-  key         = "${local.lambda_name_underscore}.zip"
-  source      = data.archive_file.lambda.output_path
-  acl         = "private"
-  source_hash = null_resource.run_install_requirements.triggers["dir_sha1"]
-  depends_on  = [data.archive_file.lambda]
-  metadata = {
-    last_updated = data.archive_file.lambda.output_base64sha256
-  }
+  bucket     = var.lambda_artefact_storage_bucket
+  key        = "${local.lambda_name_underscore}-${null_resource.run_install_requirements.triggers.dir_sha1}.zip"
+  source     = data.archive_file.lambda.output_path
+  acl        = "private"
+  depends_on = [data.archive_file.lambda]
+  etag       = filemd5(data.archive_file.lambda.output_path)
 }
 
 resource "aws_lambda_function" "lambda" {