nginx redirect to domain when user enters IP address
Solution 1:
You need to add a valid https block for the IP address.
However, since you cannot get certificates which can be used with an IP address, you will be left with a URL that gives a SSL error from the browser.
Solution 2:
It's because HTTPS uses port 443. So just add another listen statement like this:
server {
listen 80;
listen 443;
server_name IP_OF_MY_VPS;
return 301 https://example.com$request_uri;
}