chore: application.propertise 포트 변경

Author: choubung

src/main/resources/application.properties

@@ -1,6 +1,6 @@
 spring.application.name=openMission
 spring.profiles.include=oauth
-server.port=8080
+server.port=${PORT:9090}
 
 spring.datasource.url=${DB_URL:jdbc:h2:./mydb;AUTO_SERVER=TRUE}
 spring.datasource.username=${DB_USERNAME:sa}