Kuzzle is not establishing socket connection - nginx

Question

This is nginx conf for Kuzzle console:
server {
listen 80;
listen 443 ssl;
ssl_certificate /etc/nginx/ssl/ *****;
ssl_certificate_key /etc/nginx/ssl *****
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_session_cache shared:SSL:10m;
# ssl_session_timeout 10m;
server_name *****
root /home/ubuntu/kuzzle-compose/kuzzle-admin-console/dist/;
index index.html;
location / {
# kill cache
add_header Last-Modified $date_gmt;
add_header Cache-Control 'no-store, no-cache';
if_modified_since off;
expires off;
etag off;
#try_files $uri $uri/ =404;
try_files $uri$args $uri$args/ /index.html;
}
}
This is Socket connection Nginx Conf which is not establishing the connection:
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
upstream kuzzle {
server localhost:7512;
}
server {
listen 443 ssl;
proxy_read_timeout 3600s;
ssl_certificate /etc/nginx/ssl/***;
ssl_certificate_key /etc/nginx/ssl/****;
# error_page 497 https://$host:17512$request_uri;
location / {
proxy_pass http://kuzzle;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
}
}
On IP it is connecting and establishing connection over http and in case if socket connection after adding ip and port in Kuzzle Console it doesn't connecting with kuzzle backend.
note: Kuzzle console (nginx conf) is working fine and connection with SSL too.