feat: add config migration

migrations/1620319260238-timezones.js

@@ -0,0 +1,18 @@
+const _ = require('lodash/fp')
+const settingsLoader = require('../lib/new-settings-loader')
+
+exports.up = function (next) {
+  settingsLoader.loadLatest()
+    .then(({ config }) => {
+      if (!_.isEmpty(config))
+        config.locale.timezone = '0:0'
+      return settingsLoader.saveConfig(config)
+    })
+    .then(() => next())
+    .catch(err => next(err))
+
+}
+
+exports.down = function (next) {
+  next()
+}