Added README.md

README.md

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+# @wharfkit/example-nodejs
+
+A simple script for nodejs that performs a token transfer using [@wharfkit/session](https://github.com/wharfkit/session) and [@wharfkit/wallet-plugin-privatekey](https://github.com/wharfkit/wallet-plugin-privatekey).
+
+## nodejs and fetch
+
+The script requires nodejs v18+ in order to run due to its dependency on fetch. If running an older version of nodejs, an instance of fetch needs to be provided, which can be done by running:
+
+```bash
+yarn add node-fetch@2.6.1
+```
+
+Then include `node-fetch` at the top of the index.js file:
+
+```js
+const fetch = require('node-fetch')
+```
+
+And pass fetch in to the 2nd parameter of the `Session` constructor.
+
+```js
+// Establish the session with all of the above parameters
+const session = new Session(
+    {
+        actor: accountName,
+        permission: permissionName,
+        chain,
+        walletPlugin: new WalletPluginPrivateKey(privateKey),
+    },
+    // The fetch function to use for API calls
+    {
+        fetch,
+    }
+)
+```