docs: document S3 CORS configuration resource

website/aws.erb

@@ -2639,6 +2639,9 @@
                                 <li>
                                     <a href="/docs/providers/aws/r/s3_bucket_analysis_configuration.html">aws_s3_bucket_analysis_configuration</a>
                                 </li>
+                                <li>
+                                    <a href="/docs/providers/aws/r/s3_bucket_cors_configuration.html">aws_s3_bucket_cors_configuration</a>
+                                </li>
                                 <li>
                                     <a href="/docs/providers/aws/r/s3_bucket_inventory.html">aws_s3_bucket_inventory</a>
                                 </li>

website/docs/r/s3_bucket_cors_configuration.html.markdown

@@ -0,0 +1,51 @@
+---
+subcategory: "S3"
+layout: "aws"
+page_title: "AWS: aws_s3_bucket_cors_configuration"
+description: |-
+  Provides a S3 bucket CORS configuration resource.
+---
+
+# Resource: aws_s3_bucket_cors_configuration
+
+Provides a S3 bucket CORS configuration resource.
+
+## Example Usage
+
+```hcl
+resource "aws_s3_bucket" "example" {
+  bucket = "example"
+  acl    = "public-read"
+}
+
+resource "aws_s3_bucket_cors_configuration" "cors_policy" {
+    bucket = aws_s3_bucket.example.bucket
+
+    cors_rule {
+        allowed_headers = ["*"]
+        allowed_methods = ["PUT", "POST"]
+        allowed_origins = ["https://www.cors-configuration-test-create.com"]
+        expose_headers  = ["x-amz-server-side-encryption", "ETag"]
+        max_age_seconds = 3000
+    }
+}
+
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `bucket` - (Required) The name of the bucket to apply the CORS configuration to.
+
+* `cors_rule` - (Required) A rule of [Cross-Origin Resource Sharing](https://docs.aws.amazon.com/AmazonS3/latest/dev/cors.html) (documented below).
+
+The `CORS` object supports the following:
+
+* `allowed_headers` (Optional) Specifies which headers are allowed.
+* `allowed_methods` (Required) Specifies which methods are allowed. Can be `GET`, `PUT`, `POST`, `DELETE` or `HEAD`.
+* `allowed_origins` (Required) Specifies which origins are allowed.
+* `expose_headers` (Optional) Specifies expose header in the response.
+* `max_age_seconds` (Optional) Specifies time in seconds that browser can cache the response for a preflight request.
+
+