Added shelf template shared between shelf and post page.

renderer/container.vue

@@ -48,13 +48,6 @@ async function logout() {
 </script>
 
 <style>
-.content {
-	display: flex;
-	flex-direction: column;
-    padding: 1rem;
-    flex-grow: 1;
-}
-
 .logo svg {
     height: 100%;
     width: auto;