Update application.properties

Author: sungchaewon

src/main/resources/application.properties

@@ -22,13 +22,13 @@ spring.application.name=FixLog
 server.port=8083
 
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
-spring.datasource.url=${mysql_url}
-spring.datasource.username=${mysql_username}
-spring.datasource.password=${mysql_password}
+spring.datasource.url=${MYSQL_URL}
+spring.datasource.username=${MYSQL_USERNAME}
+spring.datasource.password=${MYSQL_PASSWORD}
 
 spring.jpa.hibernate.ddl-auto=create
 spring.jpa.properties.hibernate.format_sql=true
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
 
 ##### jwt #####
-spring.jwt.secret=${jwt_key}
+spring.jwt.secret=${JWT_KEY}