update Readme

Author: yakuter

README.md

@@ -1,21 +1,52 @@
 # PassWall Desktop
 
-#### Build Setup
+<p align="center">
+    <img src="https://www.yakuter.com/wp-content/yuklemeler/passwall-cover.png" alt="" width="800" height="450" />
+</p>
+<p align="center">
+    The <strong>PassWall Desktop</strong> is an Electron Vue application that powers the web vault (https://vault.passwall.io/).
+</p>
+
+## Build/Run
+
+### Requirements
+
+- [Node.js](https://nodejs.org)
+- [Electron](https://www.electronjs.org)
+
+### Run the app
 
 ``` bash
 # install dependencies
-npm install
+yarn
 
 # serve with hot reload at localhost:9080
-npm run dev
+yarn run dev
 
 # build electron application for production
-npm run build
+yarn run build
+```
+
+You can adjust your API endpoint settings in `src/renderer/api/HTTPClient.js` by changing the `baseURL`. For example:
 
-# run unit tests
-npm test
+```js
+const client = Axios.create({
+  baseURL: 'https://vault.passwall.io',
+  headers: {
+    'Content-Type': 'application/json; charset=utf-8',
+    Accept: 'application/json, text/plain, */*'
+  }
+})
+```
 
-# lint all JS/Vue component files in `src/`
-npm run lint
+If you want to point your local passwall server address, you can set:
 
+```js
+const client = Axios.create({
+  baseURL: 'http://localhost:3625',
+  headers: {
+    'Content-Type': 'application/json; charset=utf-8',
+    Accept: 'application/json, text/plain, */*'
+  }
+})
 ```