How to proxy https to http and enable ssl?

Hello everyone,

I have configured an app that communicated via websocket (ws) protocol. I want to config this app over https but getting “mixed content error”:

** The app was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint.

Now I want to proxy https to http while enabling the SSL as well.

My current configs are:

server {
           listen 443;
           server_name verify.flexibilitaetsmarkt.de;

            ssl_certificate /etc/letsencrypt/live/verify.flexibilitaetsmarkt.de/fullchain.pem; # managed by Certbot
            ssl_certificate_key /etc/letsencrypt/live/verify.flexibilitaetsmarkt.de/privkey.pem; # managed by Certbot
            include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
            ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
         
           ssl on;
           ssl_session_cache  builtin:1000  shared:SSL:10m;

        location / {
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            

            proxy_pass http://127.0.0.1:8000;
            proxy_read_timeout 86400;       
         
        }
    }



server {
	listen 8000;
       
	root /home/ubuntu/alf_poc/app;
	# Add index.php to the list if you are using PHP
	index index.html;

}

However, I’m still getting the same error. Is there any help how can I proxy/redirect https to http and enable SSL as well?

Many thanks