Fix: .env.example

Author: 14KGun

.env.easy.example

@@ -1,15 +1,18 @@
+# required environment variables
 PORT=[back의 port(e.g. 80)]
 DB_PATH=[mongoDB path(e.g. mongodb://localhost:27017/local)]
+AWS_ACCESS_KEY_ID=[AWS Access key ID]
+AWS_SECRET_ACCESS_KEY=[AWS Secret access key]
+AWS_S3_BUCKET_NAME=[AWS S3 Bucket name]
+AWS_S3_URL=[AWS S3 url(e.g. https://<bucket-name>.s3.<region>.amazonaws.com)]
+
+# optional environment variables
 REDIS_PATH=[redis path(e.g. redis://127.0.0.1:6379)]
 SESSION_KEY=[세션 관리에 사용되는 키(임의 값 아무거나 설정하면 된다)]
 JWT_SECRET_KEY=[JWT 관리에 사용되는 키(임의 값 아무거나 설정하면 된다)]
 SPARCSSSO_CLIENT_ID=[스팍스SSO ID]
 SPARCSSSO_CLIENT_KEY=[스팍스SSO PW]
 CORS_WHITELIST=[CORS 정책에서 허용하는 도메인의 목록(e.g. ["http://localhost:3000"])]
-AWS_ACCESS_KEY_ID=[AWS Access key ID]
-AWS_SECRET_ACCESS_KEY=[AWS Secret access key]
-AWS_S3_BUCKET_NAME=[AWS S3 Bucket name]
-AWS_S3_URL=[AWS S3 url(e.g. https://<bucket-name>.s3.<region>.amazonaws.com)]
 GOOGLE_APPLICATION_CREDENTIALS=[GOOGLE_APPLICATION_CREDENTIALS JSON]
 TEST_ACCOUNTS=[스팍스SSO로 로그인시 무조건 테스트로 로그인이 가능한 허용 아이디 목록]
 SLACK_REPORT_WEBHOOK_URL=[Slack 웹훅 URL들이 담긴 JSON]

.env.hard.example .env.example

@@ -29,7 +29,7 @@ $ npm install --save
 
 ### Set Environment Configuration
 See [notion page](https://www.notion.so/sparcs/Environment-Variables-1b404bd385fa495bac6d5517b57d72bf).
-Refer to [.env.easy.example](.env.easy.example) or [.env.hard.example](.env.hard.example) and write your own `.env`.
+Refer to [.env.example](.env.example) and write your own `.env`.
 
 ## Backend Route Information
 See [Backend Route Documentation](src/routes/docs/README.md)