added a static asset ver to solve caching issue

Author: wilfreddenton

src/Lib/Server/Template.hs

@@ -32,6 +32,7 @@ instance ToHtml a => ToHtml (Template a) where
       let description = case descriptionM of
             Nothing -> "unsafePerformIO is the blog and personal website of Wilfred Denton."
             Just description' -> description'
+          assetVer = "1"
       title_ $ toHtml title
       meta_ [charset_ "utf-8"]
       meta_ [name_ "description", content_ description]
@@ -51,12 +52,12 @@ instance ToHtml a => ToHtml (Template a) where
       meta_ [name_ "twitter:image", content_ "https://unsafe-perform.io/static/img/favicon.png"]
       meta_ [name_ "twitter:card", content_ "summary"]
       link_ [rel_ "icon", type_ "image/png", href_ "/static/img/favicon.png"]
-      link_ [rel_ "stylesheet", type_ "text/css", href_ "/static/css/style.css"]
+      link_ [rel_ "stylesheet", type_ "text/css", href_ $ "/static/css/style.css?=" <> assetVer]
       link_ [rel_ "stylesheet", type_ "text/css", href_ "/static/css/bootstrap-grid.min.css"]
       link_ [rel_ "stylesheet", type_ "text/css", href_ "/static/katex/katex.min.css"]
       script_ [src_ "/static/katex/katex.min.js"] ("" :: Text)
       script_ [src_ "/static/katex/auto-render.min.js"] ("" :: Text)
-      script_ [src_ "/static/js/script.js", async_ "true"] ("" :: Text)
+      script_ [src_ $ "/static/js/script.js?=" <> assetVer, async_ "true"] ("" :: Text)
       script_ [src_ "https://www.googletagmanager.com/gtag/js?id=UA-131857401-1", async_ "true"] ("" :: Text)
       script_ "window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-131857401-1');"
     body_ $ do