Create Progressive Web App (#4730)

* Create manifest and serviceworker

* Create templates and add AppSubUrl

* Add JSRenderer

* fix ctx type

* Add JSRenderer to static.go

* Complete adding {{AppSubUrl}}

* Add more fonts to urlsToCache

* Add 512px and 192px icons

* Hardcode font MD5

* Default theme doesn't have a specific CSS file

modules/templates/dynamic.go

@@ -45,6 +45,18 @@ func JSONRenderer() macaron.Handler {
 	})
 }
 
+// JSRenderer implements the macaron handler for serving JS templates.
+func JSRenderer() macaron.Handler {
+	return macaron.Renderer(macaron.RenderOptions{
+		Funcs:     NewFuncMap(),
+		Directory: path.Join(setting.StaticRootPath, "templates"),
+		AppendDirectories: []string{
+			path.Join(setting.CustomPath, "templates"),
+		},
+		HTMLContentType: "application/javascript",
+	})
+}
+
 // Mailer provides the templates required for sending notification mails.
 func Mailer() *template.Template {
 	for _, funcs := range NewFuncMap() {

modules/templates/static.go

@@ -129,6 +129,15 @@ func JSONRenderer() macaron.Handler {
 	})
 }
 
+// JSRenderer implements the macaron handler for serving JS templates.
+func JSRenderer() macaron.Handler {
+	return macaron.Renderer(macaron.RenderOptions{
+		Funcs:              NewFuncMap(),
+		TemplateFileSystem: NewTemplateFileSystem(),
+		HTMLContentType:    "application/javascript",
+	})
+}
+
 // Mailer provides the templates required for sending notification mails.
 func Mailer() *template.Template {
 	for _, funcs := range NewFuncMap() {