perf: 增大链接池

backend/src/main/resources/application.properties

@@ -6,7 +6,7 @@ server.port=8081
 # Hikari
 spring.datasource.type=com.zaxxer.hikari.HikariDataSource
 spring.datasource.hikari.minimum-idle=5
-spring.datasource.hikari.maximum-pool-size=15
+spring.datasource.hikari.maximum-pool-size=100
 spring.datasource.hikari.auto-commit=true
 spring.datasource.hikari.idle-timeout=30000
 spring.datasource.hikari.pool-name=DatebookHikariCP