NGINX - simple reverse proxy

Question

TLDR: I'm trying to reverse proxy a web-app through Nginx and it isn't passing through as it should.

Nginx

server {
    listen 80;
    server_name dns.example.com;
    access_log logs/dns.access.log main;

    index index.php index.html;

    location / {
        root /var/www/com.example.dns;
        proxy_pass http://192.168.1.30:5380;
    }
}

docker: https://hub.docker.com/r/jpillora/dnsmasq/~/dockerfile/

appication: https://github.com/jpillora/webproc

if I connect directly (http://localnetwork.lan:5380) it works like a charm. If I connect via the reverse proxy (http://dns.example.com/) the images show up but not the active parts.

What am I missing? How can I proxy_pass the application through?

Answer 1

Add an error_log directive so that nginx can tell you what is wrong. Make sure the ngx_http_proxy_module has been enabled.

Answer 2

Daniels comment put me in the right direction: Websockets and "upgrade" to 1.1

https://www.nginx.com/blog/websocket-nginx/

location /wsapp/ {
    proxy_pass http://wsbackend;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
}