[1] Refine README; [2] Use default setting when run the app

README.md

@@ -19,7 +19,15 @@ The main purpose is to introduce how to implement the essential elements in web
 For more basic knowledge of Flask, you can refer to [a tutorial on Tutorialspoint](https://www.tutorialspoint.com/flask/).
 
 
-## Details
+## How to Run
+
+- Step 1: Make sure you have Python packages *flask*, *hashlib*, and *sqlite3* installed.
+
+- Step 2: Go to this app's directory and run `python app.py`
+
+
+
+## Details about This Toy App
 
 There are three tabs in this toy app
 
@@ -33,6 +41,7 @@ There are three tabs in this toy app
 A few accounts were set for testing, like ***admin*** (password: admin), ***test_1*** (password: 123456), etc. You can also delete or add accounts after you log in as ***admin***.
 
 
+
 ## References
 
 - http://flask.pocoo.org/