Add Viewport Meta in header

src/views/general.nim

@@ -33,6 +33,7 @@ proc renderMain*(body: VNode; prefs: Prefs; title="Nitter"; titleText=""; desc="
           text titleText & " | " & title
         else:
           text title
+
       meta(name="viewport", content="width=device-width, initial-scale=1.0")
       meta(property="og:type", content=`type`)
       meta(property="og:title", content=titleText)