HTTP to HTTPS Nginx

There are 2 methods to redirect to https in Nginx

1st method is to create a separate server block for port 80 and redirect all to https.

server {
  listen 80; //ipv4
  listen [::]:80; //ipv6
  server_name example.com;
  return 301 https://$host$request_uri;
}

2nd method is to add a if statement and redirect only if the check is true.

if ($scheme = http) {
  return 301 https://$host$request_uri;
}

if you use cloudflare you can use the following statement to redirect traffic to https

if ($http_cf_visitor ~ '{"scheme":"http"}') {
  return 301 https://$host$request_uri;
}