* cleanup code for URL type
* fix makefile for trace mode
* refactor, merge Entry, RawEntry and Route into one.
* Implement fileserver.
* refactor: rename HTTPRoute to ReverseProxyRoute to avoid confusion
* refactor: move metrics logger to middleware package
- fix prometheus metrics for load balanced routes
- route will now fail when health monitor fail to start
* fix extra output of ls-* commands by defer initializaing stuff, speed up start time
* add test for path traversal attack, small fix on FileServer.Start method
* rename rule.on.bypass to pass
* refactor and fixed map-to-map deserialization
* updated route loading logic
* schemas: add "add_prefix" option to modify_request middleware
* updated route JSONMarshalling
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Co-authored-by: yusing <yusing@6uo.me>
