Relative typography for the dashboard

Signed-off-by: Romein van Buren <romein@vburen.nl>

lib/dashboard/build.js

@@ -56,14 +56,14 @@ async function build({ server, settings }) {
     });
 
     const { output } = await bundle.generate({
-      sourcemap: true,
+      sourcemap: false,
       format: 'iife',
       name: 'app',
       file: 'public/build/bundle.js',
     });
 
     return {
-      map: output[0].map.toUrl(),
+      map: output[0].map ? output[0].map.toUrl() : '',
       code: output[0].code,
       css: cssOutput.css,
     };