NGINX "502 bad gateway request" when making a 'GET' request

Hello,

I’m running nodejs app on a droplet and everything works fine, but when I try to make a GET request to my server I end up with a 502 error. The get is pointed to www.example.com/down. Everything worked fine, when I run the server locally with npm start.

This is the error log of nginx:

2018/04/01 20:17:02 [error] 22119#22119: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 95.49.110.41, server: saveinsta.me, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:5000/", host: "saveinsta.me"

And my nginx config:

server_name saveinsta.me www.saveinsta.me;

        location / {
                proxy_pass http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;

        }

I tried the advice on another thread to change “localhost” to "127.0.0.1 ", but nothing has changed. It is possible that something is wrong with my node app code, so I’ll link it here: (https://github.com/bikowalczyk/saveinsta.me/blob/gif_server/index.js).

Any help would be greatly appreciated.

Thank you!