s3 folders structure (#442)

A simple module to create folders in an s3 bucket

terraform-modules/aws/s3/folders/README.md

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+## Requirements
+
+No requirements.
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | n/a |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_s3_object.directory_structure](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_object) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_bucket_name"></a> [bucket\_name](#input\_bucket\_name) | The name of the S3 bucket | `any` | n/a | yes |
+| <a name="input_folder_structure"></a> [folder\_structure](#input\_folder\_structure) | The folder structure to create in S3. <br>Example usage:<br>[<br>    "folder1",<br>    "folder2",<br>    "folder3",<br>    "folder4/subfolder1/subfolder2"<br>] | `list(string)` | n/a | yes |
+
+## Outputs
+
+No outputs.

terraform-modules/aws/s3/folders/main.tf

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+locals {
+  folder_structure_map = { for idx, folder in var.folder_structure : idx => folder }
+}
+
+resource "aws_s3_object" "directory_structure" {
+  for_each = local.folder_structure_map
+
+  bucket = var.bucket_name
+  key    = each.value
+  content_type = "application/x-directory"
+}

terraform-modules/aws/s3/folders/variables.tf

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+variable "bucket_name" {
+  description = "The name of the S3 bucket"
+}
+
+variable "folder_structure" {
+  type = list(string)
+  description = <<-EOT
+    The folder structure to create in S3. 
+    Example usage:
+    [
+        "folder1",
+        "folder2",
+        "folder3",
+        "folder4/subfolder1/subfolder2"
+    ]
+  EOT
+}