Merge branch 'ログイン機能' into 'master'

DB接続　追加

See merge request !3

src/main/resources/application.properties

 spring.datasource.url=jdbc:mysql://localhost:3306/limited
 spring.datasource.username=root
-spring.datasource.password=kanikani7
 security.basic.enabled=false
 spring.datasource.driverClassName=com.mysql.jdbc.Driver