do not log requests to static content.

http_middleware.go

@@ -1,9 +1,17 @@
 package main
 
-import "net/http"
+import (
+	"net/http"
+	"strings"
+)
 
 func loggingMiddleware(next http.HandlerFunc) http.HandlerFunc {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if strings.HasPrefix(r.URL.Path, "/static/") || strings.HasPrefix(r.URL.Path, "/favicon") {
+			next.ServeHTTP(w, r)
+			return
+		}
+
 		path := r.URL.Path
 		if r.URL.RawQuery != "" {
 			path += "?" + r.URL.RawQuery