Fix music sample

src/lib/pug/base.pug

@@ -8,7 +8,7 @@ html.no-js(lang="en")
     link(rel="stylesheet", href="~/src/lib/scss/main.scss")
     block stylesheets
     title="tlater.net"
-  body
+  body.d-flex.flex-column
     block navigation
       include ./navigation
 

src/lib/scss/main.scss

@@ -1,3 +1,8 @@
 @import 'custom-bootstrap';
 /* @import 'fonts'; */
 @import 'headings';
+
+html, body {
+  height: 100%;
+  width: 100%;
+}