add .npmignore

.npmignore

@@ -0,0 +1,4 @@
+
+build/
+node_modules/
+example/

README.md

@@ -1,13 +1,28 @@
 # NodeJS Driver for CrossDB
 
 ## Pre-requirement
-You need to [install](https://crossdb.org/get-started/install/) crossdb lib first 
+You need to [install](https://crossdb.org/get-started/install/) crossdb lib first
+
+> ### Not ready for production
+
+## Install
+```sh
+  npm install @croosdb/crossdb-nodejs
+```
+### to Use
+
+```javascript
+  const CrossDB = require('@croosdb/crossdb-nodejs');
+
+  const db = new CrossDB(':memory:');
+// or
+  const db = new CrossDB('./<<path>>/<<db name>>');
+```
 
-> not ready for production
 
 ## Run Example
 
 ```sh
-npm install
-npm start
+  npm install
+  npm start
 ```