feature: Supports reading language from environment variables, which …

…makes it easy to modify the language after packaging into a Docker image

src/plugins/i18n.plugin.ts

@@ -5,7 +5,7 @@ import { createI18n } from 'vue-i18n';
 
 const i18n = createI18n({
   legacy: false,
-  locale: 'en',
+  locale: import.meta.env.VITE_LANGUAGE || 'en',
   messages,
 });