add documentation for aws_transfer_web_app_customization

Author: tabito-hara

website/docs/r/transfer_web_app_customization.html.markdown

@@ -0,0 +1,81 @@
+---
+subcategory: "Transfer Family"
+layout: "aws"
+page_title: "AWS: aws_transfer_web_app_customization"
+description: |-
+  Terraform resource for managing an AWS Transfer Family Web App Customization.
+---
+
+# Resource: aws_transfer_web_app_customization
+
+Terraform resource for managing an AWS Transfer Family Web App Customization.
+
+## Example Usage
+
+### Basic Usage
+
+```terraform
+resource "aws_transfer_web_app" "test" {
+  identity_provider_details {
+    identity_center_config {
+      instance_arn = tolist(data.aws_ssoadmin_instances.test.arns)[0]
+      role         = aws_iam_role.test.arn
+    }
+  }
+  web_app_units {
+    provisioned = 1
+  }
+  tags = {
+    Name = "test"
+  }
+}
+
+resource "aws_transfer_web_app_customization" "test" {
+  web_app_id   = aws_transfer_web_app.test.id
+  favicon_file = filebase64("${path.module}/favicon.png")
+  logo_file    = filebase64("${path.module}/logo.png")
+  title        = "test"
+}
+```
+
+## Argument Reference
+
+The following arguments are required:
+
+* `web_app_id` - (Required) The identifier of the web app to be customized.
+
+The following arguments are optional:
+
+* `favicon_file` - (Optional) Base64-encoded string representing the favicon image. Terraform will detect drift only if this argument is specified. To remove the favicon, recreate the resource.
+* `logo_file` - (Optional) Base64-encoded string representing the logo image. Terraform will detect drift only if this argument is specified. To remove the logo, recreate the resource.
+* `title` – (Optional) Title of the web app.
+
+## Attribute Reference
+
+This resource exports the following attributes in addition to the arguments above:
+
+* `id` - Same as `web_app_id`.
+
+## Timeouts
+
+[Configuration options](https://developer.hashicorp.com/terraform/language/resources/syntax#operation-timeouts):
+
+* `create` - (Default `5m`)
+* `delete` - (Default `5m`)
+
+## Import
+
+In Terraform v1.5.0 and later, use an [`import` block](https://developer.hashicorp.com/terraform/language/import) to import Transfer Family Web App Customization using the `web_app_id`. For example:
+
+```terraform
+import {
+  to = aws_transfer_web_app_customization.example
+  id = "webapp-12345678901234567890"
+}
+```
+
+Using `terraform import`, import Transfer Family Web App Customization using the `web_app_id`. For example:
+
+```console
+% terraform import aws_transfer_web_app_customization.example webapp-12345678901234567890 
+```