more features and fix database/mysql:jwt example

_examples/auth/basicauth/database/README.md

@@ -0,0 +1,44 @@
+# BasicAuth + MySQL & Docker Example
+
+## ⚡ Get Started
+
+Download the folder.
+
+### Install (Docker)
+
+Install [Docker](https://www.docker.com/) and execute the command below
+
+```sh
+$ docker-compose up --build
+```
+
+### Install (Manually)
+
+Run `go build` or `go run main.go` and read below.
+
+#### MySQL
+
+Environment variables:
+
+```sh
+MYSQL_USER=user_myapp
+MYSQL_PASSWORD=dbpassword
+MYSQL_HOST=localhost
+MYSQL_DATABASE=myapp
+```
+
+Download the schema from [migration/db.sql](migration/db.sql) and execute it against your MySQL server instance.
+
+<http://localhost:8080>
+
+```sh
+username: admin
+password: admin
+```
+
+```sh
+username: iris
+password: iris_password
+```
+
+The example does not contain code to add a user to the database, as this is out of the scope of this middleware. More features can be implemented by end-developers.