update docs

README.md

@@ -264,8 +264,8 @@ const { smartpack, smartunpack, plikOneshotUpload, fetchWithBackoff } = msghandl
 const payload1 = ["test_message", "Hello World", "text"];
 const payload2 = ["config_data", { key: "value" }, "dictionary"];
 const payload3 = ["table_data", [{id: 1, name: "Alice"}], "jsontable"];
-const image_bytes = new Uint8Array([1, 2, 3, ...]); // Image data
-const payload4 = ["user_avatar", image_bytes, "image"];
+const file_data = fs.readFileSync('./test/large_image.png');  // Read image from file
+const payload4 = ["user_avatar", file_data, "binary"];
 
 const payloads = [payload1, payload2, payload3, payload4];  // Array of arrays
 
@@ -524,10 +524,10 @@ Send image data directly in messages:
 using msghandler
 
 # Read image file
-image_path = "./path/to/image.jpg"
+image_path = "./test/large_image.png"
 image_data = read(image_path)
 
-data = [("user_avatar", image_data, "image")]
+data = [("user_avatar", image_data, "binary")]
 env, env_json_str = smartpack("/chat/room1", data; fileserver_url="http://localhost:8080")
 ```
 
@@ -536,14 +536,32 @@ env, env_json_str = smartpack("/chat/room1", data; fileserver_url="http://localh
 Send image data directly in messages:
 
 ```javascript
-const image_data = new Uint8Array([1, 2, 3, ...]); // Image bytes
+import fs from 'fs';
+
+const file_data = fs.readFileSync('./test/large_image.png');
 
 const [envelope, envelopeJsonStr] = await msghandlerCSR.smartpack("/chat/room1", [
-    ["user_avatar", image_data, "image"]
+    ["user_avatar", file_data, "binary"]
 ]);
 ```
 
-### Example 6: Request-Response Pattern
+### Example 6: Table Data (JavaScript)
+
+For JavaScript frontend, use `jsontable` for tabular data:
+
+```javascript
+const tableData = [
+    { id: 1, name: "Alice", score: 95 },
+    { id: 2, name: "Bob", score: 88 },
+    { id: 3, name: "Charlie", score: 92 }
+];
+
+const [envelope, envelopeJsonStr] = await msghandlerCSR.smartpack("/data/analysis", [
+    ["students", tableData, "jsontable"]
+]);
+```
+
+### Example 7: Request-Response Pattern
 
 Bi-directional communication with reply-to support.