Create application.properties

application.properties

@@ -0,0 +1,4 @@
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://${MYSQL_HOST}:${MYSQL_PORT}/${MYSQL_DATABASE}?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false&allowPublicKeyRetrieval=true
+spring.datasource.username=${MYSQL_USER}
+spring.datasource.password=${MYSQL_PASSWORD}