Rework Azure Blob Storage documentation to be more clear (#1122)

Co-authored-by: Yaron Schneider <yaronsc@microsoft.com>

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

@@ -40,20 +40,62 @@ The above example uses secrets as plain strings. It is recommended to use a secr
 
 To perform a create blob operation, invoke the Azure Blob Storage 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": {
-    "field1": "value1"
-  }
+  "data": "YOUR_CONTENT"
 }
 ```
 
 #### Example:
 
-```bash
+> We escape since ' is not supported on Windows
+> On Windows, utilize CMD (PowerShell has different escaping mechanism)
 
-curl -d '{ "operation": "create", "data": { "field1": "value1" }}' \
+**Saving to a random generated UUID file**
+
+```bash
+curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\" }" \
+      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+```
+
+**Saving to a specific file**
+
+```bash
+curl -d "{ \"operation\": \"create\", \"data\": \"Hello World\", \"metadata\": { \"blobName\": \"my-test-file.txt\" } }" \
+      http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
+```
+
+**Saving a file**
+
+To upload a file, encode it as Base64 and let the Binding know to deserialize it:
+
+```yaml
+apiVersion: dapr.io/v1alpha1
+kind: Component
+metadata:
+  name: <NAME>
+  namespace: <NAMESPACE>
+spec:
+  type: bindings.azure.blobstorage
+  version: v1
+  metadata:
+  - name: storageAccount
+    value: myStorageAccountName
+  - name: storageAccessKey
+    value: ***********
+  - name: container
+    value: container1
+  - name: decodeBase64
+    value: "true"
+```
+
+Then you can upload it as you would normally:
+
+```bash
+curl -d "{ \"operation\": \"create\", \"data\": \"YOUR_BASE_64_CONTENT\", \"metadata\": { \"blobName\": \"my-test-file.jpg\" } }" \
       http://localhost:<dapr-port>/v1.0/bindings/<binding-name>
 ```