fixup! use mysql as example

docs/site/migration/datasources.md

@@ -14,7 +14,8 @@ datasources from LoopBack 3 to LoopBack 4 is simple.
 In LoopBack 3, all datasources are defined in the `server/datasources.json`
 file, whereas in LoopBack 4 each datasource is defined in its own file in the
 `src/datasources` folder. Each LoopBack 4 datasource has a configuration file
-(e.g. `db.datasource.config.ts`) and a class file (e.g. `db.datasource.ts`).
+(e.g. `mysql-ds.datasource.config.ts`) and a class file (e.g.
+`mysql-ds.datasource.ts`).
 
 ## Migration Steps
 
@@ -23,18 +24,18 @@ steps:
 
 1. In the root of your LoopBack 4 application, use the `lb4 datasource` command
    to create a new datasource and enter the same datasource name as your
-   LoopBack 3 application's datasource (e.g. `db`):
+   LoopBack 3 application's datasource (e.g. `mysqlDs`):
 
    ```
    $ lb4 datasource
-   ? Datasource name: db
+   ? Datasource name: mysqlDs
    ```
 
 2. For the remaining prompts from the `lb4 datasource` command, use the defaults
    (press Enter for each one) since these will be replaced in the next step:
 
    ```
-   ? Select the connector for db: In-memory db (supported by StrongLoop)
+   ? Select the connector for mysqlDs: In-memory db (supported by StrongLoop)
    ? window.localStorage key to use for persistence (browser only):
    ? Full path to file for persistence (server only):
    ```
@@ -48,19 +49,29 @@ steps:
 
    ```json
    {
-     "db": {
-       "name": "db",
-       "connector": "memory"
+     "mysqlDs": {
+       "name": "mysqlDs",
+       "connector": "mysql",
+       "host": "demo.strongloop.com",
+       "port": 3306,
+       "database": "getting_started",
+       "username": "demo",
+       "password": "L00pBack"
      }
    }
    ```
 
-   {% include code-caption.html content="src/datasources/db.datasource.config.json" %}
+   {% include code-caption.html content="src/datasources/mysql-ds.datasource.config.json" %}
 
    ```json
    {
-     "name": "db",
-     "connector": "memory"
+     "name": "mysqlDs",
+     "connector": "mysql",
+     "host": "demo.strongloop.com",
+     "port": 3306,
+     "database": "getting_started",
+     "username": "demo",
+     "password": "L00pBack"
    }
    ```