diff --git a/proxy/doc.go b/proxy/doc.go
deleted file mode 100644
index 8888271..0000000
--- a/proxy/doc.go
+++ /dev/null
@@ -1,5 +0,0 @@
-//
-// Package proxy implements a HTTP caching proxy for Node package registry (NPM).
-// See https://github.com/emeralt/npm-cache-proxy/ for more information about proxy.
-//
-package proxy // import "https://github.com/emeralt/npm-cache-proxy/proxy"
diff --git a/proxy/main.go b/proxy/proxy.go
similarity index 76%
rename from proxy/main.go
rename to proxy/proxy.go
index c45400b..b5d554a 100644
--- a/proxy/main.go
+++ b/proxy/proxy.go
@@ -1,4 +1,8 @@
-package proxy
+//
+// Package proxy implements a HTTP caching proxy for Node package registry (NPM).
+// See https://github.com/emeralt/npm-cache-proxy/ for more information about proxy.
+//
+package proxy // import "https://github.com/emeralt/npm-cache-proxy/proxy"
 
 import (
 	"net/http"
diff --git a/proxy/server.go b/proxy/server.go
index 16cd38e..fc917c3 100644
--- a/proxy/server.go
+++ b/proxy/server.go
@@ -9,6 +9,7 @@ import (
 	zap "go.uber.org/zap"
 )
 
+// ServerOptions provides configuration for Server method
 type ServerOptions struct {
 	ListenAddress string
 }