Update README.md

Author: surmon-china

README.md

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+<p align="center">
+  <img src="/logo.svg" height="120px" />
+</p>
+
 # mongodb-data-api
 
-MongoDB atlas [data API](https://docs.atlas.mongodb.com/api/data-api/) SDK for @nodejs
+MongoDB Atlas [Data API](https://docs.atlas.mongodb.com/api/data-api/) SDK for Node.js.
+
+---
+
+### Installation
+
+```bash
+npm install mongodb-data-api --save
+```
+
+or
+
+```bash
+yarn add mongodb-data-api
+```
+
+### Usage
+
+#### Init
+
+```ts
+import { MongoDBDataAPI, Region } from 'mongodb-data-api'
+
+// init by URL Endpoint
+const api = new MongoDBDataAPI({
+  apiKey: '<your_mongodb_api_key>',
+  urlEndpoint: 'https://data.mongodb-api.com/app/<your_mongodb_app_id>/endpoint/data/beta'
+})
+
+// or init by app ID
+const api = new MongoDBDataAPI({
+  apiKey: '<your_mongodb_api_key>',
+  appId: '<your_mongodb_app_id>'
+})
+
+// specific region of app
+const api = new MongoDBDataAPI({
+  apiKey: '<your_mongodb_api_key>',
+  appId: '<your_mongodb_app_id>',
+  region: Region.Virginia
+})
+```
+
+#### Actions
+
+See [MongoDB Data API Resources](https://docs.atlas.mongodb.com/api/data-api-resources/).
+
+- [`api.findOne`](https://docs.atlas.mongodb.com/api/data-api-resources/#find-a-single-document)
+- [`api.find`](https://docs.atlas.mongodb.com/api/data-api-resources/#find-multiple-documents)
+- [`api.insertOne`](https://docs.atlas.mongodb.com/api/data-api-resources/#insert-a-single-document)
+- [`api.insertMany`](https://docs.atlas.mongodb.com/api/data-api-resources/#insert-multiple-documents)
+- [`api.updateOne`](https://docs.atlas.mongodb.com/api/data-api-resources/#update-a-single-document)
+- [`api.updateMany`](https://docs.atlas.mongodb.com/api/data-api-resources/#update-multiple-documents)
+- [`api.replaceOne`](https://docs.atlas.mongodb.com/api/data-api-resources/#replace-a-single-document)
+- [`api.deleteOne`](https://docs.atlas.mongodb.com/api/data-api-resources/#delete-a-single-document)
+- [`api.deleteMany`](https://docs.atlas.mongodb.com/api/data-api-resources/#delete-multiple-documents)
+- [`api.aggregate`](https://docs.atlas.mongodb.com/api/data-api-resources/#run-an-aggregation-pipeline)
+
+#### Action examples
+
+1. find a single document
+
+```ts
+api
+  .findOne({
+    dataSource: '<target_cluster_name>',
+    database: '<target_database_name>',
+    collection: '<target_collection_name>',
+    filter: { name: 'Surmon' }
+  })
+  .then((result) => {
+    console.log(result.document)
+  })
+```
+
+2. insert a single document
+
+```ts
+api
+  .insertOne({
+    dataSource: '<target_cluster_name>',
+    database: '<target_database_name>',
+    collection: '<target_collection_name>',
+    document: {
+      name: 'Surmon',
+      age: 19
+    }
+  })
+  .then((result) => {
+    console.log(result.insertedId)
+  })
+```
+
+3. run an aggregation pipeline
+
+```ts
+api
+  .aggregate({
+    dataSource: '<target_cluster_name>',
+    database: '<target_database_name>',
+    collection: '<target_collection_name>',
+    pipeline: [
+      { $match: { status: 'urgent' } },
+      { $group: { _id: '$productName', sumQuantity: { $sum: '$quantity' } } }
+    ]
+  })
+  .then((result) => {
+    console.log(result.documents)
+  })
+```
+
+#### Method chaining
+
+```ts
+// api.$cluster
+const clusterA = api.$cluster('a')
+
+// api.$cluster.$database
+const databaseB = clusterA.$database('b')
+const databaseC = clusterA.$database('c')
+
+// api.$cluster.$database.$collection
+const bItemCollection = databaseB.$collection('item')
+const cItemCollection = databaseC.$collection('item')
+
+// actions
+bItemCollection.findOne({ filter: {/*...*/} })
+cItemCollection.insertOne({ document: {/*...*/} })
+
+// -------------
+
+// chaining is equivalent to the api call
+api.$cluster('a').$database('b').$collection('c').findOne({ filter: {} })
+// the same as
+api.findOne({
+  dataSource: 'a',
+  database: 'b',
+  collection: 'c',
+  filter: {}
+})
+```
+
+#### Specific Action
+
+You can specific the action request to prevent this package from lagging relative to the official one.
+
+```ts
+api.$$action('findOne', {
+  dataSource: '...',
+  database: '...',
+  collection: '...',
+  filter: {}
+})
+```
+
+### Development
+
+```bash
+# install dependencies
+yarn
+
+# lint
+yarn lint
+
+# test
+yarn test
+
+# build
+yarn build
+```
+
+### Changelog
+
+Detailed changes for each release are documented in the [release notes](https://github.com/surmon-china/mongodb-data-api/blob/master/CHANGELOG.md).
+
+### License
+
+[MIT](https://github.com/surmon-china/mongodb-data-api/blob/master/LICENSE)