filipesaraiva you'll need 2 proxy port apps, 1 for Nginx and 1 for Microblog.pub.
In the Nginx config the Nginx port will be used for the listen
directive in the server
block, eg:
server {
listen XXXXX;
....
The other port will be used for a proxy_pass
directive in a location
block, eg:
location / {
proxy_pass http://127.0.0.1:YYYYY;
}