Add default and fallback language

Dockerfile

@@ -24,7 +24,7 @@ RUN adduser -S nextjs -u 1001
 
 # You only need to copy next.config.js if you are NOT using the default configuration
 COPY --from=builder /app/next.config.js ./
-COPY --from=builder /app/next-i18next.config.js ./next-i18next.config.js
+COPY --from=builder /app/next-i18next.config.js ./
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
 COPY --from=builder /app/node_modules ./node_modules

next-i18next.config.js

@@ -3,5 +3,7 @@ module.exports = {
     defaultLocale: 'en',
     locales: ['en'],
     localeExtension: 'yml',
+    defaultLanguage: 'en',
+    fallbackLng: ['en'],
   },
 };