update graphql advanced example

graphql/juniper-advanced/README.md

@@ -1,28 +1,34 @@
 # juniper-advanced
 
-GraphQL Implementation in Rust using Actix, Juniper, and Mysql as Database
+GraphQL Implementation in Rust using Actix, Juniper, and MySQL as Database
 
 ## Prerequisites
 
-- Rust Installed
-- MySql as Database
+- MySQL server
 
 ## Database Configuration
 
-Create a new database for this project, and import the existing database schema has been provided named ```mysql-schema.sql```.
+Create a new database for this project, and import the existing database schema has been provided named `mysql-schema.sql`.
 
-Create ```.env``` file on the root directory of this project and set environment variable named ```DATABASE_URL```, the example file has been provided named ```.env.example```, you can see the format on there.
-
-## Run
+Create `.env` file on the root directory of this project and set environment variable named `DATABASE_URL`, the example file has been provided named `.env.example`, you can see the format in there.
+
+```sh
+cat mysql-schema.sql | mysql -u root -D graphql_testing
+```
+
+## Usage
 
 ```sh
-# go to the root dir
 cd graphql/juniper-advanced
+cp .env.example .env
+# edit .env and insert your DB credentials
 cargo run
 ```
 
 ## GraphQL Playground
 
+GraphQL provides its own documentation. Click the "docs" link in the top right of the GraphiQL UI to see what types of queries and mutations are possible.
+
+```
+http://localhost:8080/graphiql
 ```
-http://127.0.0.1:8080/graphiql
-```