Add Brazilian Portuguese translations (#202)

* Fisrt time Portuguese Brazilian translation

* Revised translation to Portuguese Brazilian

* Corrected PR error: Unexpected token, expected ","

* Exported the pt-br pack in index.js

* Translated the docker missing keys

* Added the new constants

* Corrected issues with the suggested tips

* Tab -> spaces

Co-authored-by: Fernando Pimenta <fernandopimenta@tecnosys.com.br>
Co-authored-by: Matt (IPv4) Cowley <me@mattcowley.co.uk>

src/nginxconfig/i18n/en/templates/app.js

@@ -32,6 +32,7 @@ export default {
     en: 'English',
     zhCN: 'Chinese (simplified)',
     zhTW: 'Chinese (traditional)',
+    ptBR: 'Portuguese (brazilian)',
     singleColumnMode: 'Single column mode',
     splitColumnMode: 'Split column mode',
     perWebsiteConfig: 'Per-website config',