fix user_locale and favicon

plugins/i18n.js

@@ -2,16 +2,28 @@ import Vue from 'vue'
 import VueI18n from 'vue-i18n'
 import merge from 'lodash/merge'
 import locales from '../locales'
+import acceptLanguage from 'accept-language'
 
 Vue.use(VueI18n)
 
-export default async ({ app, store }) => {
+export default async ({ app, store, req }) => {
 
-  // Set i18n instance on app
-  for (const lang in store.state.user_locale) {
-    if (locales[lang]) { merge(locales[lang], user_locale[lang]) }
+  if (process.server) {
+    const acceptedLanguages = req.headers['accept-language']
+    const supportedLanguages = ['en', 'it', 'es']
+    acceptLanguage.languages(supportedLanguages)
+    const lang = acceptLanguage.get(acceptedLanguages)
+    store.commit('setLocale', lang || 'it')
+    
+    const user_locale = await app.$axios.$get('/settings/user_locale')
+    if (user_locale[store.state.locale]) { store.commit('setUserLocale', user_locale[store.state.locale]) }
   }
 
+  if (store.state.user_locale) {
+    merge(locales[store.state.locale], store.state.user_locale)
+  }
+
+  // Set i18n instance on app
   app.i18n = new VueI18n({
     locale: store.state.locale,
     fallbackLocale: 'it',