Add plumber api routing

• Add a location block each time you want to add an API.

    location /palmer/ {
      # Check the book to see if he has added more!
      proxy_pass http://localhost:8555/;
      proxy_set_header Host $host;
    }

• sudo systemctl restart nginx
• Test it at your “Public IPv4 DNS” /palmer/stats and /palmer/__docs__/.