Added middleware to let excluded files skip middleware chain

middleware/favicon.go

@@ -0,0 +1,17 @@
+package middleware
+
+import (
+	"net/http"
+)
+
+func Favicon(next http.Handler) http.Handler {
+	return http.HandlerFunc(
+		func(w http.ResponseWriter, r *http.Request) {
+			if r.URL.Path == "/favicon.ico" {
+				http.ServeFile(w, r, "static/favicon.ico")
+			} else {
+				next.ServeHTTP(w, r)
+			}
+		},
+	)
+}