Feat/fileserver (#60)

* 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>

internal/docker/idlewatcher/watcher.go

@@ -50,8 +50,8 @@ var (
 
 const dockerReqTimeout = 3 * time.Second
 
-func registerWatcher(watcherTask *task.Task, entry route.Entry, waker *waker) (*Watcher, error) {
-	cfg := entry.IdlewatcherConfig()
+func registerWatcher(watcherTask *task.Task, route route.Route, waker *waker) (*Watcher, error) {
+	cfg := route.IdlewatcherConfig()
 
 	if cfg.IdleTimeout == 0 {
 		panic(errShouldNotReachHere)