Run local dev server on https

Makes testing of e.g. audio recording possible, since Chrome won't record audio while on http pages.

vue.config.js

@@ -6,4 +6,8 @@ module.exports = {
   publicPath: process.env.NODE_ENV === 'production'
     ? './'
     : './',
+
+    devServer: {
+      https: true
+    },
 }