Set container timezone defaults

Author: BeomSeokYu

deploy/.env.example

@@ -6,6 +6,8 @@ IMAGE_TAG=latest
 # App runtime
 APP_PORT=9000
 SPRING_PROFILES_ACTIVE=default
+TZ=Asia/Seoul
+JAVA_OPTS=-Duser.timezone=Asia/Seoul
 
 # Database (MariaDB on Raspberry Pi 4B)
 SPRING_DATASOURCE_URL=jdbc:mysql://192.168.0.4:3306/algorithm_blog?serverTimezone=Asia/Seoul

deploy/docker-compose.yml

@@ -12,6 +12,8 @@ services:
     environment:
       SPRING_PROFILES_ACTIVE: ${SPRING_PROFILES_ACTIVE:-default}
       SERVER_PORT: "9000"
+      TZ: ${TZ:-Asia/Seoul}
+      JAVA_OPTS: ${JAVA_OPTS:-"-Duser.timezone=Asia/Seoul"}
       SPRING_DATASOURCE_URL: ${SPRING_DATASOURCE_URL}
       SPRING_DATASOURCE_USERNAME: ${DB_USERNAME}
       SPRING_DATASOURCE_PASSWORD: ${DB_PASSWORD}