From 99fe6afe5d6279a9a8c466d9d231294a60673c18 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Mierzwa?= <l.mierzwa@gmail.com>
Date: Thu, 27 Dec 2018 15:58:22 +0100
Subject: [PATCH 1/2] chore(build): store file metadata when generating binary
 assets

This was disabled because bindata_assetfs.go file was stored in git, not it's not so we can re-enable it and get accurate Last-Modified headers in HTTP responses
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index cee5162d2..dd617782f 100644
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,7 @@ endif
 	touch $@
 
 bindata_assetfs.go: .build/deps-build-go.ok .build/artifacts-bindata_assetfs.$(GO_BINDATA_MODE) .build/artifacts-ui.ok
-	go-bindata-assetfs -o bindata_assetfs.go -nometadata ui/build/... ui/src/...
+	go-bindata-assetfs -o bindata_assetfs.go ui/build/... ui/src/...
 
 $(NAME): .build/deps-build-go.ok go.mod bindata_assetfs.go $(SOURCES)
 	GO111MODULE=on go build -ldflags "-X main.version=$(VERSION)"

From 7c8b9b3dfedcf25c3a1b5c4bd6005b065ec7f32e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Mierzwa?= <l.mierzwa@gmail.com>
Date: Sun, 4 Nov 2018 11:53:42 +0000
Subject: [PATCH 2/2] fix(backend): return 404 if custom asset files are
 missing

---
 assets.go      | 3 ++-
 assets_test.go | 8 ++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/assets.go b/assets.go
index 4a51216c5..b50da0e36 100644
--- a/assets.go
+++ b/assets.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"errors"
+	"fmt"
 	"html/template"
 	"net/http"
 	"os"
@@ -81,7 +82,7 @@ func serverFileOrEmpty(path string, contentType string, c *gin.Context) {
 		return
 	}
 	if _, err := os.Stat(path); os.IsNotExist(err) {
-		c.Data(200, contentType, nil)
+		c.Data(404, contentType, []byte(fmt.Sprintf("%s not found", path)))
 		return
 	}
 	c.File(path)
diff --git a/assets_test.go b/assets_test.go
index ccffc0550..148efed94 100644
--- a/assets_test.go
+++ b/assets_test.go
@@ -33,15 +33,15 @@ func TestCustomizationAssets(t *testing.T) {
 		{
 			customJS: "foo/bar/custom.js",
 			path:     "/custom.js",
-			code:     200,
-			body:     "",
+			code:     404,
+			body:     "foo/bar/custom.js not found",
 			mime:     "application/javascript",
 		},
 		{
 			customCSS: "foo/bar/custom.css",
 			path:      "/custom.css",
-			code:      200,
-			body:      "",
+			code:      404,
+			body:      "foo/bar/custom.css not found",
 			mime:      "text/css",
 		},
 		{