feat: app rate limit (#5844)

Co-authored-by: liuzhenghua-jk <liuzhenghua-jk@360shuke.com>
Co-authored-by: takatost <takatost@gmail.com>

docker-legacy/docker-compose.yaml

@@ -39,6 +39,8 @@ services:
       # File Access Time specifies a time interval in seconds for the file to be accessed.
       # The default value is 300 seconds.
       FILES_ACCESS_TIMEOUT: 300
+      # The maximum number of active requests for the application, where 0 means unlimited, should be a non-negative integer.
+      APP_MAX_ACTIVE_REQUESTS: ${FILES_ACCESS_TIMEOUT:-0}
       # When enabled, migrations will be executed prior to application startup and the application will start after the migrations have completed.
       MIGRATION_ENABLED: 'true'
       # The configurations of postgres database connection.