added examples for gcp storage bucket binding

daprdocs/content/en/operations/components/setup-bindings/supported-bindings/gcpbucket.md

@@ -70,6 +70,85 @@ This component supports **output binding** with the following operations:
 
 - `create`
 
+### Create file
+
+To perform a create operation, invoke the GCP Storage Bucket binding with a `POST` method and the following JSON body:
+
+> Note: by default, a random UUID is generated. See below for Metadata support to set the name
+
+```json
+{
+  "operation": "create",
+  "data": "YOUR_CONTENT"
+}
+```
+
+#### Examples
+
+
+##### Save text to a random generated UUID file
+  
+{{< tabs Windows Linux >}}
+  {{% codetab %}}
+  On Windows, utilize cmd prompt (PowerShell has different escaping mechanism)
+  ```bash
+  curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\" }" http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+  {{% codetab %}}
+  ```bash
+  curl -d '{ "operation": "create", "data": "Hello World" }' \
+        http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+{{< /tabs >}}
+
+##### Save text to a specific file
+
+{{< tabs Windows Linux >}}
+
+  {{% codetab %}}
+  ```bash
+  curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\", \"metadata\": { \"name\": \"my-test-file.txt\" } }" \
+        http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+  {{% codetab %}}
+  ```bash
+  curl -d '{ "operation": "create", "data": "Hello World", "metadata": { "name": "my-test-file.txt" } }' \
+        http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+{{< /tabs >}}
+
+
+##### Upload a file
+
+To upload a file, pass the file contents as the data payload; you may want to encode this in e.g. Base64 for binary content.
+
+Then you can upload it as you would normally:
+
+{{< tabs Windows Linux >}}
+
+  {{% codetab %}}
+  ```bash
+  curl -d "{ \"operation\": \"create\", \"data\": \"(YOUR_FILE_CONTENTS)\", \"metadata\": { \"name\": \"my-test-file.jpg\" } }" http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+  {{% codetab %}}
+  ```bash
+  curl -d '{ "operation": "create", "data": "$(cat my-test-file.jpg)", "metadata": { "name": "my-test-file.jpg" } }' \
+        http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+  ```
+  {{% /codetab %}}
+
+{{< /tabs >}}
+
 ## Related links
 
 - [Basic schema for a Dapr component]({{< ref component-schema >}})