title: pgadmin4 wont work in specific location behind nginx
body: <p>I got some trouble: pgadmin working perfect behind nginx in location /, but it wont work behind location /pgadmin
  Work great:</p>
  
  <pre><code>location / {
           proxy_http_version 1.1;
           proxy_set_header X-Real-IP  $remote_addr;
           proxy_set_header X-Forwarded-For $remote_addr;
           proxy_set_header Host $host;
  
           proxy_pass         http://127.0.0.1:5050;
  }
  </code></pre>
  
  <p>Wont work:</p>
  
  <pre><code>location /pgadmin {
           proxy_http_version 1.1;
           proxy_set_header X-Real-IP  $remote_addr;
           proxy_set_header X-Forwarded-For $remote_addr;
           proxy_set_header Host $host;
  
           proxy_pass         http://127.0.0.1:5050;
  }
  </code></pre>
  
  <p>May be i need some specific rewrite?</p>