feat: update config

src/main/resources/application.properties

@@ -1,14 +1,23 @@
+# for mysql
 spring.datasource.url=${MYSQL_URL:jdbc:mysql://localhost:3306/openisle}
 spring.datasource.username=${MYSQL_USER:root}
 spring.datasource.password=${MYSQL_PASSWORD:password}
 spring.jpa.hibernate.ddl-auto=update
 
+# for jwt
+app.jwt.secret=${JWT_SECRET:ChangeThisSecretKeyForJwt}
+app.jwt.expiration=${JWT_EXPIRATION:86400000}
+
+# ========= Optional =========
+# for resend email send service, you can improve your service by yourself
 resend.api.key=${RESEND_API_KEY:}
+# your email services: ...
+
+# for tencent cloud image upload service, you can improve your service by yourself
 cos.base-url=${COS_BASE_URL:https://example.com}
 cos.secret-id=${COS_SECRET_ID:}
 cos.secret-key=${COS_SECRET_KEY:}
 cos.region=${COS_REGION:ap-guangzhou}
 cos.bucket-name=${COS_BUCKET_NAME:}
+# your image upload services: ...
 
-app.jwt.secret=${JWT_SECRET:ChangeThisSecretKeyForJwt}
-app.jwt.expiration=${JWT_EXPIRATION:86400000}