chore(docs): update documentation for #16 (#18)

Co-authored-by: kangasta <[email protected]>

Author: github-actions[bot]

docs/index.md

@@ -3,12 +3,12 @@
 page_title: "objsto Provider"
 subcategory: ""
 description: |-
-  The objsto provider is used to manage S3 compatible object storage services such as UpCloud Managed Object Storage https://upcloud.com/products/object-storage.
+  The objsto provider is used to manage S3 compatible object storage services such as UpCloud Managed Object Storage https://upcloud.com/products/object-storage. The provider manages the resources using the S3 API of the target object storage service.
 ---
 
 # objsto Provider
 
-The `objsto` provider is used to manage S3 compatible object storage services such as [UpCloud Managed Object Storage](https://upcloud.com/products/object-storage).
+The `objsto` provider is used to manage S3 compatible object storage services such as [UpCloud Managed Object Storage](https://upcloud.com/products/object-storage). The provider manages the resources using the S3 API of the target object storage service.
 
 ## Example Usage
 

docs/resources/bucket_cors_configuration.md

@@ -0,0 +1,57 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "objsto_bucket_cors_configuration Resource - objsto"
+subcategory: ""
+description: |-
+  A bucket CORS configuration resource. Note that there can only be one CORS configuration per bucket.
+---
+
+# objsto_bucket_cors_configuration (Resource)
+
+A bucket CORS configuration resource. Note that there can only be one CORS configuration per bucket.
+
+## Example Usage
+
+```terraform
+resource "objsto_bucket" "example" {
+  bucket = "example"
+}
+
+resource "objsto_bucket_cors_configuration" "this" {
+  bucket = objsto_bucket.example.bucket
+
+  cors_rule {
+    allowed_headers = ["*"]
+    allowed_methods = ["GET", "HEAD", "DELETE", "PUT", "POST"]
+    allowed_origins = ["*"]
+    expose_headers  = ["x-amz-server-side-encryption"]
+    max_age_seconds = 3000
+  }
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required Attributes
+
+- `bucket` (String) The name of the bucket for which to configure the CORS.
+
+### Blocks
+
+- `cors_rule` (Block List) A CORS rule to apply to the bucket. (see [below for nested schema](#nestedblock--cors_rule))
+
+<a id="nestedblock--cors_rule"></a>
+### Nested Schema for `cors_rule`
+
+Required Attributes:
+
+- `allowed_methods` (Set of String) The allowed HTTP methods for this rule.
+- `allowed_origins` (Set of String) The allowed origins for this rule.
+
+Optional Attributes:
+
+- `allowed_headers` (Set of String) The headers to include in `Access-Control-Request-Headers` header.
+- `expose_headers` (Set of String) The headers to include in the `Access-Control-Expose-Headers` header.
+- `id` (String) The identifier of the rule.
+- `max_age_seconds` (Number) The cache time in seconds.